I recently purchased a nice-looking ca.1920 wooden European armchair from a thrift store. It's in good overall condition, but one of the front legs is slightly loose. I'd like to remove the leg, apply some glue to the base, put it back in and tighten it up, but there's a problem.
The front legs each have a single screw that goes through the block into the leg. At least I think they're screws, because the slots in the heads are so extremely shallow that they'll not allow any screwdriver I know of to get a grip; they're more like the suggestion of a slot. How they originally put them in, I can't imagine.
Any ideas how to loosen/tighten these things without destroying them? Are they even screws? Any tips appreciated.
The back legs each have two bolts securing each leg, so they are sound.
Thanks, Ken