TR3A Starting Crank

[Geo Hahn <geohahn@azstarnet.com>]

I'm looking to obtain a starting crank & as these come up on eBay from
time to time I thought I'd better know the specs for what I want.

It seems there were 2 or 3 variations, perhaps for the TR2/3, TR3A &
early TR4 grille differences?

Can someone tell me what to look for or ask for to determine if a
particular crank will work on a TR3A?  Thanks.

Geo Hahn
59 TR3A  [TS47905L]
Tucson, AZ