Posting on behalf of Bob Yeager.
Indeed seeing is believing!
Both pictures are of the same model 16/1860/1 with the half-hunter case.
Pic#1 to 3 is from a piece produced before the serial 030/100 while Pic #4 is 088/100.
Comparing Pic#1 to 3 with Pic #4, the model number on the caseback is different!
The 02X/100 is engraved with the model number as 1860 whereas
the 088/100 is engraved as 16/1860/1 !
Hey Bob....you have an unique piece!
Thanks for sharing with us the pictures.
Kong



