For your consideration listed on Ebay. 60’s Vintage Stahl & Associates Mechanical Tachometer Auction has a low starting price and NO RESERVE. If you are interested, here is a link to the auction;
https://m.ebay.com/itm/60-s-Vintage-...oAAOSwZoZafQxh
Other vintage speed equipment you may be interested;
https://m.ebay.com/itm/Vintage-Lakew...a/292434783337
https://m.ebay.com/itm/Vintage-NOS-M...t/292438509362