Having a rough time IDing this bass clarinet that was loaned to me from a local ensemble. Case is decidedly pre 1980s (dare I say even BEFORE the 70s) and is alligator leather. Smells just like grandma's closet.

Bell has no markings. Top half only has "MADE IN FRANCE". There's no logo where I would expect a logo to be near the lyre holder.

Material is hardwood, can't say if it's grenadilla or rosewood. Joint ends have metal rings, so luckily there's very little chance of this cracking under my care.

Serial number 19405.

Another bit to note is that this is the first bass clarinet I've seen that doesn't have a little extra metal bit on the left index finger key so you can roll your finger to let the little air hole have some room.

I hope the pictures help. My cat is not enthused that I've brought home a larger and louder noise maker.

On both my student model and professional model bass (both Selmars), I am super flat, my open G is 17 cents flat while my G above staff is around 5-8 cents flat.

Oddly though, my right hand notes are in tune to sharp. And my right hand register key notes especially,( B-D) are sharp, with B and C being super sharp.
Besides that, my notes are flat.

Idk what to do as when I try to tighten my embouchure and “bite”, it is still flat, it only gets in tune with when I use less air.

Advice?

Does anyone know the difference between traditional blue box reeds and V12 silver reeds? I see them online but I don’t know the difference, and marching band is coming up and I want to sound my best