The Vic shown is almost certainly glued. I recently removed the wood scales from a 111mm. I was not the most careful, once side removed very clean, the other I was less patient and it had some damage (mostly underside). They could actually be remounted, but a little plastic wood filler would probably be in order.
I suspect a 91mm might be a bit harder to remove actually than the 111mm, but it all depends on the glue job which can vary alot.