32 yrs old
The Model 10 was not in this serial number range, only the Model 60 and Model 651.
@1961
The first two digits in the serial are your year of mfg. Your Model 10 was made in 1970.
Can't be answered without a serial number.
@1967
1920
10-1000 USD depending on specifics. No way to age without the serial number.
1957-67
1969-1970
1961-1962
1974/75.
Made in 1968.