When I bought my 74 3C (in 1986) it had no indicators fitted, that was legal as it preceded ADRs. I used to use my right foot to indicate right hand turns, eventually decided to retrofit blinkers in a fit of self-preservation. The wiring was already there, just needed a second-hand blinker relay from the wreckers.Also several different types used, picture would help. I got lots of broken ones, now I just use my arm, to the amusement of everyone. NSW highway code still has an offence listed for "slovenly hand signal"......