These are genuine NOS Smiths TT3800/00A green coded temperature sender units for many 50's and early 60's British cars with the non stabilised (constant readout) gauge.

Fitted to early Minis 61-64 and other cars like Austin A55/60 Farina's and associated range.

I have a list of applications if you aren't sure if it's correct. 

Overseas postage via Global Shipping program