KLUSON M3JGN Single Line 3+3 Nickel
Meccaniche per chitarra elettrica paletta 3+3

MADE BY GOTOH 3+3 for old Juniors etc., nickel
 
During the 50s KLUSONS were stamped with “KLUSON DELUXE” in the center line above the little hole - so called "single lines". In the beginning of the 60s the "double line" tuners followed.
 
FORO: 8.5 mm