These aren't 1035/1039's but reference 7077 bracelets in 18k
I assume they’re 18k links but obviously the assay marks would’ve been on the clasp.
They’re certainly more than plated steel though !
I can only presume that the links are from a later production bracelet and as exactly as with the steel 7077 bracelet the double stretch links changed to single ones and whilst the clasp remained short its common name is a 7077 transitional and when the clasp became slightly longer it has then become a 7912. But still not 18k 1035/1039, more possibly 18k 7077 transitional/7912
The 18k 7077 can be seen here...
https://omegaforums.net/threads/the-7077-bracelet-explained.108172/
