The No 12 with 47 endlinks might fit better. It is not covered in the chart, but included in the new post on speedmaster bracelets.
https://omegaforums.net/threads/fro...ge-seamaster-and-speedmaster-bracelets.45883/
1175 was produced from the begining of '70 till mid-'80. Look from the '60 with square links but no spring links. 30x17mm buckle. It was fitted to Speedmasters 145.022.
The first one was made in 2-71, 1175 (No12) engraved clasp and with 640 endlinks.
The second one has no 1175 on clasp. It has 47 endlinks and is absolutely new old stock from 5-83.
This is my favorite bracelet to put on modern Speedmaster to give then a vintage look. It's less noisy than 1171 and very comfortable.
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