mendipman

The other side is held by a matching strap button that appears to screw directly into the wood with no insert. By 'filling' are you referring to glueing a small mahogany dowel into the oversize hole and then re-drilling that surface for the new insert? I do have a suitable piece of mahogany that I could use to make a dowel to fit.

This is the strap button repair I need to do:

Box player is the usual term round here.

Thank you for the strap information. I also need to fix one of the strap buttons which is loose. The button appears to screw directly into the wood with no insert. I've found these replacement buttons with inserts available online, is fitting an insert a standard 'fix' for a loose button?

I'd like to replace the straps on my Lachenal anglo 20B and am curious what the original strap pattern and colour would've been when new?