Two bracelets same ref?

Hi
After a very long search I finally found a 1172 bracelet as a replacement for mine (which is too short) Unfortunately they are the same ref. but not the same style in detail (see clasp for example). Didn’t pay attention to the outer design of the clasp😟
My plan to switch a half of the old with the new bracelet became obsolete as soon as I found out that the links (towards the end links) have different shapes (new=taller, mine=different)

Can some tell how to change the links close to the clasp as they seem to be same style.

Raw energy (push the pin out) or screw (one pin looks like a screw actually, not the one on the photo)

Appreciate any help , the lower one on the first two photos is the old original

There are so many small variations that make tasks like yours really hard (in this case probably easier), since they both clasp with the clasp rather than the buckle/top part, can't you just swap buckles (covers) - but I guess there might be differences there too

As far as I see, 1172 links have screws on only a single side, and if it's corroded, I don't think a normal person can swap it

On the bright side vintage > new style 😀

At least the main parts look to be the same size, for example 1040 and 1507 look similar but their dimensions are pretty different, so if you just loosen the metal parts a bit, remove the pin, then re-tighten them, maybe the task completes that way too

You won't be able to see much until you can get those pieces clean. Fortunately, you can do a lot to stainless steel without hurting it. Boiling it for a few minutes should help loosen the decades of gunk and having a nice, stiff brush can help with that. Some solvent might help clean that gunk out too but boiling water is perhaps the safest thing for the steel as long as you're careful.

Wow, never thought of boiling, it's a great idea, what do you mean by "as long as you're careful." though, since it can't melt?

Boiled bracelet is HOT! Wear gloves. Keep childen and pets away. Wear eye protection. Do not drink.

Yes, unfortunately my bracelet (especially the pins / screws ) are corroded, so I’ll have to try first boil to see see exactly what’s going on. (Thanks @SkunkPrince) But I am afraid I’ll have to bend the links in order to get the pins removed (if possible) or continue my search for the correct 1172

“Hey kids I made bracelet soup” 😜