This Brownie Junior 620 is the predecessor to the almost identical Target Six-20. The differences are mainly cosmetic, like the winder on the side. Earlier versions had a simple bar, later versions had a knurled knob.
Kodak was a great believer in making a thousand variations on a similar theme. This camera is very, very close to the "regular" Brownie 620 (which I don't have). The "regular" Brownie model had a slightly better lens and it had brighter viewfinders. The easy way to tell them apart is from the front plate, which had a somewhat different art-deco design.
Some day I'll get my 620 Brownie box cameras (the 2A, the Target and this guy) together for a family portrait.