#4 Size Dunlap (Sargent Made) Bench Plane

Dunlap (Sargent Made) #4 size bench plane. Dunlap tools where sold by Sears until 1956? along side Craftsman. The BL stamped on the plane means it's a Sargent made plane, later 619.xxxx was used, but I think that was on the Craftsman only, as Dunlap was discontinued in 1956? or there about. I assume this is from maybe mid 1950's?, but I can not really find much info to narrow it down.

I have just cleaned it up some and oiled moving parts, nothing else

I have so many planes they are just in my way, I need to clear out a bunch so I can finish my projects and do some remodeling.