I believe this is exactly the as fitted to Alvis Speed 20 models that used dual ignition. I has three positions, the middle for "Off" and one either side for either mag or coil. The spindle comes through the back to be connected to the H.T. change over switch on Alvises.It is marked "AM" under a crown but it is not an Air Ministry mark as far as..
For sale here is a late 1930's ZF AK 4S 15 gearbox, that has been converted with the help of a 1960's Borg-Warner "Rancho # 20" overdrive, into a ZF all synchronized -overdrive gerabox. Extremly rare,maybe unique!This particular gearbox was mounted on a Mercedes-Benz, Models W142, W143 and W153 (230). All 4 gears synchronized!
Mercedes gauge parts including;- new speedometer face 160 km/h with correct recess for milometer & tripmeter- speedometer face 140 km/h- time clock face- fuel & oil gauge face- six chrome rings- domed glass lens- new bands for around edge of gauges- five gauge mounting brack..
An original Bosch ignition coil, marked TF6/1. It is key operated (no key) at one end and has 6 connections on the bakelite end. Complete with original mounting bracket. Buyer pays shipping costs.