Without serial number, between 1966 & 1988.
CTG stands for cartridge.
50-500 usd
2k What is this value based on
made about 1962
No more than 225 USD
1969 value guesstimate around $450
400 to 600 dollars depending on condition and where you live.
About $250 in excellent condition.
1970
@ 1970
ctg: cartridge
Don't know the value, however based on proofhouse.com ,it was made in 1973.