Ebel Sportwave - remove link help

Hey fellow OF’ers. I bought an Ebel Sportwave a little while ago and the bracelet is a tad too large but I haven’t been able to shorten it.

Perhaps a long shot since they are not that common but it might be (probably is) some generic “system”. It seems that the pin just needs to be pushed out but I have tried that and they won’t move. So just wanted an opinion before I start to use more force. Also I am a little unsure if the small grooves on the underside of the bracelet mean anything.

Thanks 😀 Probably same concept. I will try to push a bit more forcefully and see if it bulges. You own a newer Ebel? If so, how is the newer bracelet?