Bosch WR5DC+ (former W5DC) / NGK BPR7ES
all R2V models ( -1985)
Compare: 12121338146 / 12-12-1-338-146
Ignition cable small, with metal spark plug.
For BMW...
Stop light switch
Fine thread diameter 6.3mm
...
Breaker contact with long wiring
for all 2 valve boxer...