Looks like a Vic, but I can't place the model. 90 degree phillips and a corkscrew, and there was glue used already- custom?
I would gently remove the glue residue that is here, and order replacedment scales from
Rotokid over at SOSAK, he's got most stock colors and sizes on hand and they are cheap. Just snap them on, no messing around with glue. Maybe upgrade to the Plus scales (pen and pin).
Or use this one as a template and make your own. Those you'll need the glue for, I'd use a non-expanding epoxy. If I had the tools, I'd love to get a Compact and replace the scales with snowflake obsidian or tigereye scales for dress use.