Had a quick look and can't find a definitive answer.
I have bought for my son to use a Beretta 687 Silver Pigeon from 2004 the front bead has sheared off leaving the thread still in, I can drill it out and remove it.
My question is what size thread will I neednas I have seen both 2.6mm and 3mm listed, I'm looking fitting at just a plain brass bead as the gun had nice gold birds on the action fences and gold oval in the stock.
I'm sure one of the forum gunsmiths will know.
Also best place to buy as I would like a spare just in case it falls out at some point.
Thanks Figgy