Period correct speedometer for 1925 ?

[Dsrdave]

I’m considering adding a speedometer to my’25 E1. I assume this would have been more of an accessory at that time. What make/model speedometer would have been used ?
Regards, dave

[g80csp11]

see link to smiths speedos in the 20's
only a guess as my 27 H4 did not have a speedo

http://archives.jampot.dk/technical/Spe ... s_1920.pdf

[Duncan]

Other period speedos were also Bonniksen http://archives.jampot.dk/technical/Gen ... peedos.pdfand Cowey http://archives.jampot.dk/technical/Spe ... e_1927.pdf

[Dsrdave]

Thanks for the info guys !