Rev counter 66 Hornet

[Gordonh]

Hello all,can anyone advise me what rev counter I need for my 66 Hornet,I'm clueless ,I have read about 2.1 and 3.1 ratios,magnetic,reverse readers,just need to know which one I need.Thanks in advance Gordon.

[Bess]

Hi,
    Its BSA part number 19-2189, Smiths part number RSM 3003-06.

Best wishes...

[Gordonh]

Thanks for that and all the best to you.