i have never seen what i believe to be a factory oem switch to have raised font.
without going into detail why i believe 232 and 2157 switches are original 1969 parts, i'll just say i believe they are the switches that came with both bikes from the factory in 1969. both LH switches have raised font. i will check 1865 and report back if this thread keeps going.
a Japanese friend of mine very recently bought me a "no turn" LH switch from Yamiya. it has stamped (recessed) "Made in Japan" font. it must be a repro switch because Yamiya advertised it as a repro switch. this switch has a TEC horn button and "HM" lettering fitted. except for the recessed font, it looks like an original switch. the only other difference i note, the insulation of the wires looks slightly different, shinier and may a half gauge off in diameter from orignal