Added some info about 1168 bracelet:
EDIT:
Here is a picture of the 18mm 1068 for the Geneve "Ancoretta" DIver and 638 endlinks on top, and below, the 20mm 1068 for the Apollo Soyuz Speedmaster and 633 endlinks. Buckles, covers, middle links are the same. The only difference is the outer links that are wider on the rarer 20mm version.
View attachment 400799
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