I finally resolved to get off my butt and start working through all the project speedos I'd accumulated recently. Grabbed a couple of each variety, worked through a complete rebuild of all, wondered along the way why everything takes six times as long as you think it will
, but finally made it through to the other side, and decided to take a shot of the assembled group for posterity (below).
This represents a sample of each Huret-built Schwinn speedometer with the exception of the black-faced exercise-bike model, which was basically a 0-40 Deluxe model without the chrome case or gold-stamped dial (though the earliest exerciser models had a slightly ludicrous 0-60 MPH range). From left to right (both top and bottom):Late-'60s/Early-'70s Schwinn Approved models:
the original design, 0-60 MPH scale, chrome case, no datestamp. (Interestingly, the speedo head shown on the instruction sheet appears to be painted white, though a production unit was never made that way.) This was mature technology by the time Schwinn contracted for it, and the internals are the same as those that Huret had been making for their own bike, motorcycle and moped units for years. A very similar design reappeared in the late 1980s into the early 1990s, with a simple "MPH" stamping in the center.Mid-'70s to 1980s Deluxe models:
dual-scale, English/metric dial design with datestamp on back of case. The range was rolled back from 0-60 to 0-40 MPH, presumably since no one in their right mind was likely to be using the upper end of the original scale on a bicycle
. Many slight variants of this design exist; these are just two of them. The upper center one has a smooth face with chrome silver (or possibly light gold) MPH scale. The lower center one has a textured face and gold numbers. Chrome/textured and gold/smooth combinations can also be found. This head was also offered in a universal tire-drive kit. Models datestamped around 1988 or later can be problematic, as Huret downsized the drive core from 2.5mm square to 1.8mm square, making post-1987 speedo heads incompatible with all the cables made in earlier decades.Schwinn Sting-Ray models:
one design made throughout. Earliest models of both these and the Schwinn Approved units use a gray sealing gasket around the glass inside (such as the one at lower right), where later ones are black, and also a die-cast retainer nut in back (under the mounting bracket) where later ones are solid brass. (The one at lower right is currently on the 'Bay as auction 231011732096.)
On to other stuff at last!