Hi Marv,
Actually I was surprised not to see the Ref 1925 in the upcoming 'unique' auction as this watch truely deserved a good spot in it.
This watch is iconic, being the direct inspiration for the modern Ultrathin, nevertheless it is very little known (even at the manufacture....), and is a very low-production watch seldomly found on the market.
It is truely a classic IMHO (and your example is great ;-) )
Another one of these beauties from the early 1960's:
Now, we talk Ultrathinn: !



