Made by Stevens. If it has no serial number, it was made before 1969.
Your wards werstern field 20ga was made buy stevens.The stevens model 94c is valued at between 50-100 dollars.
This model was made by stevens arms company.There model number designator was the stevens model 94B.
I have modelSB-100B that my father gave(brand new) for my 10th birthday back in 1974. I hope that will give you some idea of your gun's age.
This is a Stevens Model 94 shot gun. you can date it by mesuring the extractor and it will either be .433 inches at the top or .308 the .433 is older from 1950 down. and .308 is 1950 till disc. also all guns were required to have serial numbers after the 60's i believe so that would guve you a better idea. the value is around 100 bucks in great shape.