Looking for help resizing bracelet on this pretty vintage Omega

Hello all! First time posting here. I purchased this interesting looking critter from an eBay listing without much identifying information, and I'm hoping to find out if it's genuine and also how to adjust the bracelet. From what I can tell, it's 20 micron gold filled with a 625 17 jewel movement. Diameter 34mm. Case back says DD6346.

Is this a genuine vintage Omega, or was the bark finish done aftermarket by a jeweler? Either way I love the watch, but have been unable to figure out how to remove a link or two from the bracelet. Some links have some visible pin on one side, but do not readily spring out. Is this something I might be able to accomplish as a clumsy amateur, or should I take this to a smarter man than myself?

Thank you in advance for your wisdom!

~MiamiTime

They might be split pins, if so a tool like this would help
If you don’t have or want to buy a competent jeweler can probably accomplish in a few minutes

Either way save the links and pins JIC

Thank you both for your replies!

Looks like it's already been adjusted and no more links can be removed.

I would avoid it due to that