Old Yami

Yes, it has the straight bridge saddle and has the Yamaha symbol and the name”YAHAMA” on the headstock. The original pickguard has been reglued, but is a little wharped and coming loose around the points. Can the pickguard be removed and made flat and reglued again? I have pics, but don’t know how to download them.

You can try a hair dryer to heat it and putting a heavy weight on it, but that should be done off the guitar.  Resticking it in place can get messy, depending on what glue was used.  The adhesive sheets work great.  If glue was squirted under the pickguard, that needs to be scraped off, both sides, and add a couple of layers of shellac.  The pickguards fell off because the adhesive they used didn't stick to the bare wood, only the thing rim of finish at the edges.

When making a post, there's a grey button in the upper right corner of the window.  Click on it, that will open a small window to drag the picture to.