I used one for my retro 1909 project...
It's a Stewart Warner, but I believe it's a newer one from the 60’ or 70’s as it mostly made of plastic parts including the case.
Cosmetically-
I made a new period correct “Corbin Screw Corporation” face plate in Photoshop, had a local copy center print a color copy and laminate it for durability. It just sits on top of the original plate and the bezel cover and 2 existing face screws hold it in place.
I painted the case to match the patina of my bike.
And I covered the cable with a couple of screen door springs and replaced the plastic nuts with some antique brass pipe fittings.
I also converted the MIJ driver from 2 to 1 gears so I could run it on the right side of a big Yamaha brake drum I ended up using.
But these systems are somewhat fragile so I’ve also made a few structural reinforcements over time-
After vibrations had broken a couple of the original thin mounting brackets I replaced with a seat tube clamp and a heavy chunk of flat stock attached to the handle bars.
On the driver I welded a little plate that fits over pot metal boss that the cable attached to. It had vibrated loose and would spin around which made it hard to firmly attach the cable and was also at risk of completely falling off.
The weakest link I believe is the tab that fits into to hub (or more commonly between The spokes). Any kind of small resistance and it will fold over. Once this happens it’s weakened and will do it all the time!
I simply welded a 1/4” bolt to mine and slopped some bead up around the top edge of the slotted disc for a little extra strength. A little ugly, but so far it’s held up well, 0 failures!
After about 700 miles the speedometer needle began to bounce at higher speeds. Cleaning and relubercating the cable would help but still over time it continuned to get worse. At around 1100 miles it finally failed completely and locked up (This is what first bent the tab mentioned above)
But the entire internal works are held in place with a single screw, so I just replaced them with another matching old unit. And I was able to move the dials from below to match the pervious miles.
At 1534 miles everything was still working great!
-Kirk