I've been thinking about putting one on my 23 Roadster. Is there a certain brand/model that was a common accessory on this year and what all parts do I need? Anything I should be looking at/for when purchasing one (to make sure it works!)? And what is a fair price.
Most common & best (IMO) is a Stewart 160 which would be a correct era accessory for your year. Get in contact with Russ Furstnow after he gets home from Hershey - he posts on here.
Do as Steve says, you won't regret it!
The Stewart 160 may be the most common, but it is way behind the Corbin in the quality stakes. The cast steel swivel, the cast links in the drive chain, the brass chassis in the instrument itself, are way better than the potmetal stuff in the Stewart offerings.
That said, you will be competing with the motorcycle restorers for Corbin stuff, and it will cost a pretty penny.
Allan from down under.
Corbin speedometers and Jones speedometers are by far the finest speedometers available for a Model T, BUT a Corbin is much more expensive than a Stewart setup, and they are very rare. I hope this helps, Russ Furstnow