According to my word reference the significance of “Jumbo” is; noun an enormous individual or thing, adjective very huge. There are various jumbos out there.

To start with the Boeing 747, a wide-body traveler airplane bears this moniker. In the event that you at any point flew over the Atlantic with Lufthansa, KLM or British Airways you presumably had the joy of going in one. It is a threateningly enormous plane that often makes me can’t help thinking about why have I not focused harder on material science in secondary school. I most likely would have a brief look at seeing how might that monster really go up and stay there. At that point you have the jumbotron. An enormous screen you can typically discover in games fields… or in Las Vegas. You know, the one that shows you those messy Kiss-Cams in motion pictures. And afterward you have the jumbo wrist watches. Audemars Piguet has its Royal Oak Jumbo (5402 – 15202), Patek Philippe has its Nautilus Jumbo (3700-5711) and furthermore Omega has one, their reference 2505.

Jumbo GTG

Jumbo Nickname

While it is a watch moniker it doesn’t allude to one watch model. Dissimilar to the Omega Seamaster 145.024 for instance, which is the solitary watch that is nicknamed Jedi. Why? Toss Maddox named it the Jedi route before that notorious Antiquorum closeout, so that reference is, was and will be the Jedi. Enough said. The word jumbo, notwithstanding, doesn’t allude to one model or brand inside the watch world. It alludes to an unmistakable sort of watches. Jumbo watches are generally time-just models that have an altogether bigger size than its peers from a specific period. Suppose that during the ’30s 28-31mm was the size of men’s watches. Along these lines, on the off chance that you discovered one that was 34-35mm you could look at that as a jumbo. Despite the fact that as of late we are considering watches that are above 36mm or so jumbos.

Omega 2505

Based on this relationship, an Omega that initially turned out during the 40s and had a 38mm+ case is a jumbo, correct? Precisely. A jumbo as well as for some vintage Omega authorities it is the jumbo. The one to go for on the off chance that you are searching for vintage from the Biel brand with a contemporary size. Insane as it might sound, Omega delivered the reference 2505 of every 1946. To place it into point of view during the ’40s the normal size of a wristwatch was 33-34mm. Indeed, even the chronographs that individuals considered huge at the time were not bigger than 37-38mm. So to come out with a period just watch in a 38mm case was really abnormal. Presently, I’m not saying that this was the lone watch with such a size yet it obviously is the one that is promptly accessible even today on watch discussions, eBay, Chrono24 etc.


To give you the fundamental data about the Omega 2505 we should have take a gander at what the brand has about them on record. As I previously referenced over the watch turned out in 1946 as a component of their global assortment under the reference CK 2505. It had a hardened steel case (thus the CK) 38.5mm, excluding the crown. The thickness is 10.7mm and the drag tip to carry tip length of the case is an incredible 46.5mm. Other than the common steel watch, with some karma, you may likewise have the option to locate a gold plated rendition under the ref. BK 2505. Albeit that is a pleasant watch I need to say I’m in support of the steel. But the reference number is an intriguing and significant identifier of a watch what is so cool about the Omega reference 2505 is the way that various distinctive dial variety came out during its creation run.


First a touch more about the case however. As I said the CK 2505 is treated steel with a press toward the rear. Thusly, the watch has no water obstruction, pretty typical for watch from the ’40s. The case is round and immense with moderately short however thick drags. In the event that you turn the Omega ref. 2505 to the side you can see the descending arch of the carries. This causes the watch to sit on the wrist comfortably. I have numerous watches, wore considerably more as a writer yet I can guarantee you that this watch is similarly pretty much as comfortable as generally out there. Vintage or present day the same. Discussing comfort, the carries are bored so changing a tie is no issue by any means. Moreover one can utilize a Rolex-style spring bar with it. The solitary Achilles impact point of the Omega 2505 Jumbo is the dial. All the more exactly, to locate a unique one.

Many Faces

The Omega reference 2505 Jumbo more likely than not been an extraordinary dealer since you can discover numerous models still right up ’til the present time. Any place you search for them in the long run they spring up, often for modest cash. As of late I sourced one for a companion for somewhat less than €500. It has a few issues (like wrong hands), however nothing serious. Also, above all; it had the first dial. Because of the case not being water safe a considerable lot of the watches have either seriously harmed or repainted dials. The ones that are unique often come from sellers at madly significant expenses – how about we be reasonable, however much I love these watches, they are scarcely in the €1.2-2K value range. All things considered the dial configuration is genuinely basic. Most pieces just had raised files, similar to mine. Some had painted or even applied numerals yet that is about it. Hardly any models have area, two-tone or waffle dials.

Finding a watch with a unique dial can be testing now and again. Indeed, even to the prepared watch authorities. As the watch was made for various years logos or text styles change. Some have painted Omega images, others have raised, etc. You truly need to realize your exchange to pick the right ones. Another alternative, on the off chance that you got one that ended up being redial, is to look for a unique substitution dial. Odds are thin, however not feasible. You clearly need to search briefly Omega dial in 32mm (that is the measurement of the face). Would be cool if the posting additionally referenced that the dial fits the type 265. Once more, I figured out how to discover such a giver dial and development a couple of months prior, so it’s possible. In any case, you need to effectively look for it.

Caliber 265

Now that we took a gander at everything outwardly, how about we take a look inside the huge steel case. The development inside the Omega reference 2505 is the type 265. It is a manual breeze, sub-second development with approximately 45 hours of force save, 15 gems, and 18,000 Vph. The 265 is additionally the straight relative of Omega’s unbelievable workhorse caliber  30T2 . That one (the 30T2 that is) likewise has 15 gems yet no stun security. The 265 then again as of now has that and it’s antimagnetic. Some time ago often times a watch with a bigger case was the pointer that it is hostile to attractive. We have seen this with the Tissot Antimagnetique I discussed some time back. The development family the 265 has a place with went into creation somewhere in the range of 1939 and 1963 during which countless developments emerged from Biel.

Final Words

When new, the CK 2505 was sold on a calfskin lash. I saw a few gatherers putting period right globules of rice arm bands on them and I need to say I truly love the look. It simply doesn’t work for me on my wrist. Amusingly, my 2505 is the solitary Omega I own that has an Extract from the Archives by Omega. I requested it in 2014 so it isn’t just about as extravagant as the new ones you’d get today, should you request one. It doesn’t disclose to me such a large number of new things other than the creation date (February eighth, 1951) and the country it was conveyed to, which is Switzerland. Because of the long creation run and the way that there are as yet various models available the reference 2505 remaining parts perhaps the most intriguing vintage time just Omegas known to collectors.

If you are hoping to discover some information about a vintage Omega piece of yours, ensure you check part of their website.