Hello there (stumbled on this thread a little late…)
I have a VERY similar bass. Outline is basically the same and it is also on the smaller side (like 102-103 cm str. length if I remember correctly).
It is supposed to be a Seitz from 1840.
When I bought it however, I had no idea who he was. I bought it because I really liked the bass, and it came with an old invoice that said ”Ferdinand Seitz 1840*” from the previous owner (who bought it in Bremen around 15-20 years ago).
I have personally never had anything done to the bass, so I have no idea wether it has one of those pretty signatures inside like yours or not. Others who have met the bass during it’s 15-20 years in Copenhagen say that it has. But I don’t know.
Great sounding bass however! And a beauty. The varnish is very pretty; golden/red, which as I understand is quite typical for this type of Mittenwald. Also very pretty flamey maple.
Mine looks a little more worn than yours, and it has some battle scars (not sure when it was restored last time). Tuners are similar but slightly different.
I’ll try to post some pictures
View attachment 4839252 View attachment 4839253 View attachment 4839254 View attachment 4839255 View attachment 4839256 View attachment 4839257
If you want to hear the bass (unfortunately with me doing some poopy playing) you can go to my instagram:
Sebastian Nordström (@sebastiannordstrom) • Instagram photos and videos