I picked up this Longines on ebay last week (poorly listed, but I certainly wasn't the only person bidding on it!)
I thought it looked like one of the steel-cased 6b/159s with a skimmed caseback - crown / dial / minute hand are all correct for this.
Having got the watch though I'm not really sure and would appreciate any thoughts.
It certainly looks like a steel case, the profile is different from the two alloy cased ones I have.
Also I note that the back of each of the lugs have a sort of seam which looks similar to one that was sold on classicwatch.com a while back (see here)
Thing is the case doesn't appear to be skimmed. I measure it as 0.58mm, which is the same as an engraved caseback that I have; I have another alloy-cased Longines 6b/159 which has a skimmed case back and that one measures 0.45mm
Also I'm unsure about the "Staybrite" formulation which is marked on the caseback, I don't see this on foilguy's stainless 6b from this thread which I was using as a reference.
So I guess my questions boil down to:
- does anyone else have a "Staybrite" marked Longines 6b/159?
- anyone else measure a skimmed caseback as thick as 0.58mm?
- is there a possibility it's a non-issued model or indeed a civilian watch that's very similar to the 6b/159?
- is there any info about the numbering inside the case back?
thanks in advance for any help!