1944-1950
Mossberg and sons made your Montgomery Wards(Western field) model 37.The Mossberg model 30 is the same rifle.These were made by Mossberg and sons between the years 1933-1935.The value of a Mossberg model 30 is between 45-100 dollars.
The Mossberg and Sons Model 146B was manufactured in 1954-1958.
Your Western Field model M830 was made by the Mossberg and Sons firearms Company.It is the Mossberg model 340K which was made from 1958-1980.
Your western Field model 830b was made by Mossberg and Sons for Montgomery Wards(Westernfield).The Mossberg model 340K and your firearm are one and the same.
Model 42M(c) was made 1947-1950.
Mossberg and sons made your Western field model 15K.The Mossberg model 80,or the model 83 both apply to your model 15K shotgun.
1950-64 depending on which variant
It was made from 1936-1938.
The Mossberg and Sons model 26B was made from 1938-1941.The value is between 35-100 dollars,depending on overall condition.
Your Montgomery Wards model M72 was made by the firm Mossberg and Sons,It is the Mossberg model 472PRA which was made from 1974-1976.
You have the rare version of the model 26,as it has the mannlicher-style stock.The Mossberg model B26M(M is for Mannlicher style stock) was made in the year 1938 only.
.Doing an online search, it was made in 1933 and 1934