Vintage Seamaster 166.0209 bracelet identification/link sourcing

Hi OF! Longtime lurker, first-time poster.

I am trying to identify the bracelet I received with a 166.0209 Seamaster day/date I recently purchased. Sadly, I need like one or two more links for it to fit me properly.

It has "no. 12" stamped on the inside of the clasp, "11-78" stamped on one of the folding portions, and 131 endlinks.

By my (untrained) eye, it seems similar to some of the brick-style Constellation bracelets from the period. But I am struggling to pinpoint what exactly I have.

Anybody know what I've got and know where I can find one or two links?

Cheers,
jdw_atl

Well, it’s hard to help without any actual photos of the bracelet links. Could be a 1040.

You know what? This is a completely valid and reasonable response in light of my sins

so here is a photo 🤦

95% sure that’s a 1040. Hard to find links out in the wild though. Might need to find a full bracelet