Here is a unique Stewart-Warner 3,500 rpm mechanical tach that appears to be N.O.S. It features the traditional early green side light windows, a classy pendulum needle & the rpm's displayed in the sought after "long number" style. It fits the standard 3-3/8" hole. The thing is beautiful & works well. H.A.M.B priced at $57. How can you go wrong? The price is plus shipping....let's say $13 to the lower 48. PayPal would be best, but a Postal Money Order would work, as well. The first P.M. committing to buy gets it.