This gun was made in 1968 and should be worth around $250-$300 if in good shape and if is a 12 GA. If it is a 16 or 20 GA it will be worth a little more.
1973 - Ithaca Model 37 Featherlight
Made in 1964
100-400 USD depending on condition.
Gun was made in 1961. Value is 100 to 350 depending on condition.
Without the serial number, the question can't be answered
1976 is the year
The serial number indicates your gun was manufactured in 1966.
1910
Check the receiver.
Made in 1952
1900
Made in 1969. Info from Ithaca Gun Co. serial number check chart.