Looking for info:

[Big Smoke]

In the 32nd Blue Book of Gun Values, page 1845, it reads:

MODEL 87 SEMI-AUTO- .22 LR cal., tube mag., round tapered barrel, over 1.8 million makde in numerous variations, including the Model 6, 76, 87, 187, 188, 60, 90, 88, 388, 887, and many others under the brand names for Sears, Montgomery Ward, Western Auto, CIL, Coast to Coast, etc., model numbers include letter suffix added as changes were made. Introduced in 1938, and continued through the early 1980's.

Condition.100%......98%.....95%.....90%.....80%... ..70%.....60%
Value......$150......$130....$110.....$90......$70 ......$60......$50


I didn't find any designation for an 87b model specifically.

[sdmc530]

Originally Posted by Big Smoke

In the 32nd Blue Book of Gun Values, page 1845, it reads:

MODEL 87 SEMI-AUTO- .22 LR cal., tube mag., round tapered barrel, over 1.8 million makde in numerous variations, including the Model 6, 76, 87, 187, 188, 60, 90, 88, 388, 887, and many others under the brand names for Sears, Montgomery Ward, Western Auto, CIL, Coast to Coast, etc., model numbers include letter suffix added as changes were made. Introduced in 1938, and continued through the early 1980's.

Condition.100%......98%.....95%.....90%.....80%... ..70%.....60%
Value......$150......$130....$110.....$90......$70 ......$60......$50


I didn't find any designation for an 87b model specifically.

This is all the same info I found. I called a buddy of mine who is a ns,sears,coast to coast type junky of things and he said the "b" was for a bolt design change, but was not %100 percent sure. He thought you had a mid production model maybe again not sure. Hope this helps a little bit.

[AutoMag]

You had better get it off of that old asbestos tile floor!!!

Pretty nice !!

[RandallZ]

Looks like a fun little plinker, to me.

Randall