I am in search of "3 leaf clover" style 3-screw thumbrest for a German/Czech/Austrian Eefer. 

I would be most obliged if any of you might have one about or a lead on one.

What do you suppose this vent is for on the LJ?  A tuning hole, perhaps?

https://www.ebay.com/itm/225574083513?hash=item3485435bb9:g:KnEAAOSwYhJjYPd7&amdata=enc%3AAQAIAAAA4LQgZd2dZqCTkTUEpXAZOTRYawiZa4fbmP%2Bqui3pMTG6h9L5rJd32QxkU%2BH2fTrIkYmwe48L1MNJCEp0IzV%2Ff%2FevrMJm5Jn2dwbtiXqEL5SusY5koh2J9zQv2rW6zH7FE%2BOOth81bb29kk2FypUj%2F17nztrNOxBJd%2FyxdD%2BlTExUwNsk6EqvLa3Zp7E%2BMH6odix%2B0b7gVr%2FdipqYN7FW6x2nyN%2FAc%2FpMR%2FQMlHmwqmuboV3X3OcQ4uSQOdhGuLPbCJaT6IgLUEsGbAuxEOxrqpazfHxLZnEiZ3LYq3g6RfbN%7Ctkp%3ABFBM0LKB9PVi

Weekend before last, I received a clarinet that an old friend found at a flea market for chump change.  He had no idea what he'd grabbed, but the preliminary photo got me excited.  It had been fitted with the wrong thumb rest, and an unsoldered key needed repair or replacement. (I lucked out on a rather sad but intact key from a prominent ebayer.  After a full spa day, the key looked too good for the others.
Allegedly, this clarinet survived a whole year, outside (in the broken case), in a chicken coop.  The wood was thirsty, but I have seen far worse.  The body was outstanding with no discernable damage or prior repairs, but the pads were revolting and the wood had grown some fuzz.  Remarkable what Murhpy's, orange oil, and almond oil can do.  Been a few years since I've done a resto.  Lack of practice hurts technique, but by gum--I still love to do them. 
Before and after:

Am I missing something, or is this an obsurdity, or just an exercise in doing things different?
Certainly a first for me:
https://www.ebay.com/itm/115943465967?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20221018081743%26meid%3D20bcb6786f5c4c77a4ed1b07155781ea%26pid%3D101429%26rk%3D1%26rkt%3D12%26sd%3D276009317439%26itm%3D115943465967%26pmt%3D1%26noa%3D0%26pg%3D2332490%26algv%3DSimPLMWebV1CPCAuto&_trksid=p2332490.c101429.m2460&amdata=cksum%3A11594346596720bcb6786f5c4c77a4ed1b07155781ea%7Cenc%3AAQAIAAAA8Br8uvhLIoMwmcOQTaBUxlgoK6O2DbY9KA2%252FZNoUS2cVgbV3wC0Gwe9W1zYXFnRz0kexC6WLcIlXyQwJ7czLlRIjn0LhWm3VFpxg%252Fr6EiUHC3Sgv89wOLe7XjbmCMua74FsV9jPUZg9K9Nr7WZ9ARxkHStdr54ZsQ47tF6cDJ3sYEryYUmjdKGTnfPzjwxJxK8qcEYB7Q6CW7r21bogqkf8fBrr%252BE3TWL3yaPSaSH1DhC9c0PoCYOBfJBwzDT3uBvl34wSn5Ru2Xn%252BLuJ5McB%252F8zyC2D%252BZlVjCnFMOfyuddZaCw2x8ZCWf47uAwK44fmfQ%253D%253D%7Campid%3APL_CLK%7Cclp%3A2332490

This is the first of it's kind for me. 
Model 1544. 
Missing a vital key. 
Two cracks in the barrell.
1919-1922 (diamond logo).
Valuable.

I have a few of the same in ebonite; a 152--absolutely excellent and cosmetically pristine, one 1544 in gentle shape, in need of a restoration, and one atrociously unfortunate 1554 horn that stayed whole, but that was sorely neglected. 

Seller states it's rare (and he is correct).

Grab it, folks, and best of luck with that missing key.
It can be scavenged from another Albert, or by the metallurgical master--created.
I am at my maximum capacity.


https://www.ebay.com/itm/255299254249?hash=item3b710577e9:g:X7MAAOSwt1phyMRf

I received another Harry Pedler in the mail today;  this time a pre-serialized Hard Rubber 17/6 Boehm with the "Pedler Appliance" in fine shape.  It was made almost certainly between 1924-1928, and appears to be a semi-pro-level clarinet.  The old stickers on the case appear to pre-date WWII, and say Ohio University Band, so my take is that it was used in a collegiate capacity. I expected nothing from a clarinet sold in "as-found" condition, from a seller who confessed no musical instrument knowledge.  I bought it for parts, mainly, and for my "continuing education".

Upon close inspection, I saw it was marvelously intact, (with exception to one mildly tweaked trill key that I put into order directly) despite it having that ripe smell of a clarinet put away wet forever ago, and was rather dusty, so I assembled it, and slipped in a Harry Pedler mouthpiece, and was awestruck by the deep, clear sound it registered.  And by gum, it played all the way through, bottom to top, quite acceptably.  It has perhaps a tone that rivals only my pre-1928 Boehm 17/7 Pedler.  Cosmetically, it is quite nice, and the tone certainly is impressive.  I am thinking this may be my " steady" for a while.  It put a smile on my face, and felt right in my hands.

David--this one has the softer keys you are familiar with, but they are strong, and forged nickel.  I have found that Martin-era Pedlers have the strongest, most well supported keywork, followed by the Albert Pedlers, which are rather strong, too, but more malleable than Martin's products.

It came with a Selmer HS* MP, which I have no experience with, but understand many like them.  The table, tip and rails are nigh flawless, as is the chamber, but it is dirty and has tooth indentations, and needs some spiffing up, so trying that out will have to wait for a later date.