If you are interested in trading or buying, I have the following:
SG 75mm Natty Down 9-slit stemline with worked SG bowl with logo
SG 60mm Natty Down 6-slit stemline with 18mm male joint and SG dome with white logo
David Goldstein Prototype Fritted Disc Mini can (not the commercial model, but earlier production)
Pictures are available, please let me know if you are interested.
Thank you