I've listed these on Reverb, fishing for deep-pocketed and obsessive Martin connoisseurs, but it occurred to me that maybe I've seen these on pre-war Rickenbacker lap steels (?). There are probably many correct brand/model applications.
The came to me 30+ years ago as incorrectly installed replacements on a 1958 Martin D-21. (Single Kluson Deluxes would have been correct.) I made the switch and these have sat unused since the waning days of Mourning In America. Tuners, metal buttons and bushings, but no screws. Good and serviceable condition.
If any SGF member can use these, I'll do $150 PayPal and shipped. (25% less than what I'm asking on Reverb. I've seen examples on eBay at $295.)
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--Pat Conroy (1945-2016)