Good question- not sure that anyone has an exact answer. The 46 B was made from 1938-1940, and production resumed after WW II, 1945-1946. These rifles did not have serial numbers (not required until 1968), so it is not certain that anyone has precise numbers. You may check with Mossberg- they are likely to refer you to the Mossberg Collectors Association, through havlinsales.com. Vic Havlin and his wife Cheryl run the Association, are very nice and knowledgeable folks- contact them.
PS- the 46B is an excellent target rifle. I have one, it shoots better than I do.
The Model 46B was made 1938-1946. The 46B(a) was 1946-1947, the 46B(b) was 1947-1949. These are EXCELLENT target rifles.
Manufactured for Montgomery Wards, this is a Mossberg Model 46B. The 46B was made from 1938-1946. Most date from before 1942 (WW 2, Mossberg was making training rifles for US Navy). The 46B is an excellent rifle.
The 46B was made 1938-1946. The 46B (a) was made 46-47, and the 46B (b) was made 47-49.
50-150 or so
There is a Mossberg 46B, and a 46B(b), but no B46B. The 46B is a bolt action .22 Target rifle, made 1938-1946, the 46B(b) was a later model, made 1947-49. I have a few of these- they are excellent target rifles.There IS a Mossberg Collector's Society, and a good history book of Mossberg guns (More Gun for the Money). Some info on different Mossberg 22's can be found by running a Google search for epix mossberg models.
Model number changed to 46B(a) after that year
The Mossberg 46B(b) was only made in 1947-1949, when the model number changed. Excellent target rifle.
The MOSSBERG Model 46B was made between the years 1938 and 1945.
50-200 or so
There isn't any. Mossberg did not put serial numbers on their rifles until 1968
The Mossberg mod 46B was introduced in 1938 and dropped in 1940. As a good quality bolt action target rifle it should be worth $200 in reasonable shape. Mossberg collectors might well pay more. Check out the market at Auctionarms.com The 46b-b was produced after the Second World War, 1947 to 1949.
Your Western Field model 46b was made for Montgomery Wards(Western Field) by the company Mossberg and Sons.The mossberg model 42 was made from 1935-1941 as the model 42,42A,42B,and model 42C.the western Field model 46b and the Mossberg model 42 are the same firearm.I hope that you find this informative.