I just took a new to me Railmaster in for servicing at Omega and the final quote included these parts:

OSCILLATING WEIGHT ASS. RHODIUM-PLATED O7222403A2201006 1
CO-AXIAL WHEEL O7222500C30040 1
INTERMEDIATE ESCAPE WHEEL O7222500C30039 1
REVERSING WHEEL O722112032037 1
BARREL COMPLETE O722112020011 1

Anyone know if this is 'normal'? It seem unusual to replace all these parts, unless it was a 2500A model. Near as I can tell from omega serial numbers it was produced around 2006, which is consistent with the warranty card. I think that would make it a 2500B.

The last documented service was in 2008, so that might also have something to do with it. Folks in this part of the world often service mechanical devices (anything, cars, homes, watches) only when they stop functioning.

 

Archer would be able to confirm for definite, but I think Omega lists those part numbers for the "B" version. When you get it back, you can check the version as it is stamped onto the movement.

I don't know what parts should be routinely replaced as part of a service, other than gaskets/crown and I think crown tube, or which are generally replaced only if needed, but also included in the standard price.

I didn't pay additional for any replacement parts when mine was serviced by a UK authorised service agent, and that (eventually) included a replacement co-axial wheel, although by that stage they'd messed me around so much it might be they didn't dare !

PS -that version of the Railmaster is, IMO, the best looking watch Omega has made for years.

 

Agreed, that's why I couldn't pass it up, especially in 36mm, even in non-running condition!

 

So it wasn’t running when you bought it and you are wondering why those parts were replaced? I think you just answered your own question!

 

The bearing in these wear out, leading to rubbing of the weight on the movement plates or inside of the case back (or inner cover). But since the bearing could be replaced in this, there's not usually any reason to replace the entire weight. When you get the parts back, take photos - they might be replacing it for cosmetic reasons.

Even though there's "no friction" ...

These wear out, so not unusual.

Again, pretty standard to replace this, in particular if it hasn't been replaced before.

Omega replaces these no matter what, so this is completely normal.

Usually the only thing that really needs replacing is the mainspring, but to save the watchmakers at the service center maybe 3 or 4 minutes, they replace the entire barrel. It's very wasteful usually, and now that I've written this, it may be why theya re replacing the entire rotor too...

Cheers, Al

 

OK, I finally got the watch back. Everyone at the Omega service centre was at home for the past few months. Here's the weight pics. I don't see anything wrong with it myself, but I'm not an expert either...

 

The plating appears to be flaking off, so that looks like why they replaced it.

Cheers, Al

 

Curious, is it common for the plating to flake off without moisture or something else entering the watch?

 

No, not common at all...

 

Those part numbers are from a 2500C which the 2403 you have must be based on. You can't take the 2500C in the part code as meaning that though as some 2500D movements use a 2500C code like the balance shock jewels. Most of the 2500D has drastically different parts though looking at the spec sheets (these are out of date - I don't have extranet access like Archer).

 

Thanks. I was wondering what the movement was. Must have been an early 2500C.

 

There are two versions of the movement - yours would be a 2403B.