what application for this?
 

Can any of out sharp eyed readers tell what what application this drive unit fits? It is some kind of Ford speedometer drive and the identifying prefix was CT. Is it carrier or perhaps Lynx?? Anybody recognize it?
Thanks.
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Before I saw the CT prefix, I was wondering about a speedometer adapter to allow for two speed rear axles (shifts simultaneously with the axle). is more information available about the markings cast into the assembly (including the CT number) to make it easier to research?

The number on the tag has been obscured but it seems to be.. CT17__3, or CT19__3. The unit is a Stewart Warner, 675-E, and also J-8. Tag say LV7 FORD, Ford Canada. Adaptor, speedometer.
It appears that you are correct Grant, its for a two speed axle. Using your information I found a similar unit on EBay. Thanks for your help.

E Bay photos.
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Based on the CT prefix, my guess would be a carrier part but a quick look in FUC-02 and FUC-03 parts books didn't find a part number matching those given (just saying I didn't see them, not that they can't be there).
I don't claim any great knowledge of carriers, but my understanding is that they had single speed axles so shouldn't need the change speed function.

2 speed axles suggest conventional, modified conventional or 2 wheel drive CMP of the Ford models I can think of.

The Windsor Carrier has a two speed axle and has a similar unit mounted on the axle,

Just found a picture of the speedo drive on a Windsor axle from the drivers manual