This C8 fork assembly is from an older Orange-tube telescope. The worm-gear is very nice; ~7 inch diameter, ~0.6 inches thick with a bronze 1 inch diameter worm drive. (This gear set alone is worth the asking price)
This precision drive was made by Kenton Engineering and is equipped with a 115 V synchronous motor. The drive has been up-dated to accept a standard 3-prong cord (not the old style with pins).
I am asking $150; buyer pays actual shipping (probably ~$10 - 15 UPS ground).