What a lovely instrument! Do you know what that belly button does? I have a bass clarinet somewhere with that thing and I'll be darned if I can tell what it's usage is.

Interesting how yours has unplated German silver keys. Mine appears to have some sort of yellowish, vaguely gold looking plating on it. I feel like German silver is really the way to go. Kudos on the pickup!

whoa, totally dropped the ball here.

In my tests:
1. Responsiveness. With the exception of a few maladjusted keys, the instrument was very free-blowing and required less effort than expected of a large clarinet with a giant bell.

2. Tone. It has a very smooth, pleasing sound all around. The projection is heavily increased by the huge bell, which I found also "rounds out" the sound and gives it a bit more mellow and less growl-y sound.

3. Intonation. This is a very old, 100 year old clarinet and such has the expected intonation issues. Again, the huge bell makes a difference, and can affect the notes when most holes are closed. This will take some practice to find which adjustments need to be make on which notes, but it's not an insurmountable barrier.

4. Strength. Wood is nice and tight-grained, but keys are rather soft and spindly. I suspect they would be easy to bend, especially the 3-foot long extension keys.

5. Overall. One of the most pleasant basses I've ever played. Intonation issues can be fixed with practice, and that smooth sound is to die for. 9/10 for solo playing, 7/10 for modern group playing.

For a time I played on a white bass clarinet mouthpiece. It was the same material as a standard plastic mp, far as I could tell. Unmarked.

Had a huge tip opening and really let the clarinet project pretty well. I ended up selling it when I got a Noblet 2V which was a better piece overall.

No problem!! Happy yo help

There’s a single post for LH pinky keys so really no later than 1923. The case looks more 10’s; but it’s a Boehm system so let’s call it 1915-1918 or so

My man makes some solid products that’s for sure

Here is another, pretty extraordinary find;  a LP refer for under 150 bucks that can be put back into playing condition.  I believe the build date to be early 1920s, due to relatively advanced Albert keywork and LP:  Fairly prided, but who made it?
https://www.ebay.com/itm/Eb-Low-Pitch-Wood-Clarinet-13-Keys-4-Rings-For-Restoration-Solid-Case/393089298930?_trkparms=aid%3D1110011%26algo%3DHOMESPLICE.DISCLISTINGS%26ao%3D1%26asc%3D20191002092920%26meid%3Dbf0e5ebc2ee74ab4876e1ec0661f99cb%26pid%3D101096%26rk%3D2%26rkt%3D12%26sd%3D133692486132%26itm%3D393089298930%26pmt%3D1%26noa%3D0%26pg%3D2332490%26algv%3Ddefault&_trksid=p2332490.c101096.m3021

Very very interesting. I've yet to see any stamp that writes out the "flat" instead of just using the "b."

Thanks everyone! I’m glad others really seem to like this project of mine.

I’ve considered trying to sell these once I finalized the design. From looking around, it seems like there’s a decent amount of people who would be interested, and I’d like a little compensation for the time and money I’ve invested in designing this. Although, I’d try to keep the pricing fair and not charge extravagant amounts for it like I’ve seen a lot of people do with 3D printing (often with files that aren’t even originally theirs).

Although it would be noble to provide the files to the public for free, if you invent something revolutionary you should be compensated, in my opinion. Stands are expensive, and people would FLOCK to your store if you sold these are a reasonable price.