I’ve just received this old Knilling 3/4 bass. It has a solid top and solid sides, and what I think is a laminate back. The people I got it from said their grandfather played it over 50 years ago, so from that and the following info I surmise it is a prewar German bass? “Handmade in Germany” on the Knilling logo (it couldn’t be an east/west German bass from the 70s otherwise it’d say GDP right?), a small, mostly ripped sticker on the inside that is written in German, and has finish checking all over it that looks 50+ years old—along with the smell of an old instrument. Came with an old front zipping leather bass bag and a crappy Kay German bow. Ebony fingerboard/tailpiece, beautiful original varnish, real inlayed purfling, and a nice flame to the sides/back. Am I right in thinking it is an early 1940s shop bass? What is something like this worth? TIA