Check the receiver and barrel.
00034810
No way of knowing without you providing a serial number to find the year of production of your Marlin model 39A.
Contact marlin customer service through their website.
The Marlin model 70P (Papoose) was made from 1986-1994.With out a serial number it would not be possible to say the exact year of production.
Left side under the rear site. That's where it is on my 99M1.
Serial numbers were not required before 1968. Try looking on the receiver.
You will have to contact Marlin to find out.
You will have to contact Marlin to find out.
SN's not required before 1968
By also providing the serial number in your question.
The Marlin Model 55, a bolt-action shotgun, was manufactured from 1960 to 1983. The specific date of manufacture for an individual Model 55 can typically be determined by its serial number, which can be cross-referenced with Marlin's production records. If you have a specific serial number, you may be able to find more precise information regarding its production date.
The Wikipedia site for marlin 336 rifles includes a table showing how to use the serial number to find date of manufacture.