Contact customer service thru the website at Savage firearms. Stevens is owned by Savage.
I would check with Numrich Gun Parts Corp.They may have a exploded view of the stevens model 335.
This is a stevens model 39A. The stevens 59A, B and C all had the takedown screw in front of the trigger guard.
http://www.urban-armory.com/diagrams/savage67.htm
15,000 - 20,000 U.S DOLLARS
To assemble the trigger on a Stevens Model 940E shotgun, first ensure the shotgun is unloaded and safe to work on. Begin by inserting the trigger mechanism into the receiver, ensuring that the trigger spring is correctly positioned. Align the hammer and sear components, then secure them with the appropriate pins. Finally, test the trigger function before reassembling the shotgun completely to ensure everything operates smoothly.
Try gunbroker. Pull up Stevens 56.
I don't know what the numbers on the trigger are unless they are a part number, but you can add about 25% to the asking price for a single selective trigger.
To disassemble a Stevens Model 300 shotgun, first ensure the firearm is unloaded by checking the chamber and magazine. Next, remove the forearm by unscrewing the screw located at the front of the receiver. Then, unscrew the trigger guard and remove it, which will allow you to take out the trigger group. Finally, you can separate the barrel from the receiver by unscrewing the barrel nut. Always consult the manufacturer's manual for specific instructions and safety precautions.
I am not sure about the diagram,but I would check at numrich gun parts corp. first for the parts you need.
Contact Customer Service for Savage Firearms. They have owned the Stevens name since the 1920's.
Gun shops,garage sales,gun shows,E-bay etc.
Stevens 12 ga, Model 77D, made before 1968 may not have a serial number. However, some do! If it has a serial number, it will be behind the trigger on the receiver side.