Can anyone identify the manufacturer of this offset screwdriver? I really like the design but am lost as to who made it. I know Bonney sometimes used a Circle B but don't think this is Bonney.

No other markings other than the one shown.

Isn't BMCo = Braunsdorf Mueller Co? (Forgive my spelling)

Yea, AA has some pictures also, tho they seem to have the dates botched a bit, Bransdorf was incorporated in 1901, not founded, it was founded in 1888.

B.M.Co , and B-M-Co logos (no oval) were also used sometimes, particularly for screwdrivers.

http://home.comcast.net/~alloy-artifacts/other-makers.html#braunsdorf-mueller

A patent search for this company is probably worthwhile, datamp only shows a single patent, but I got several matches incidental to the company name....

Thank you. I somehow missed the entry in AA.

Ive noticed some  tools here that funny color but I have never seen one myself. It is strange and dont care much for it, whats the idea behind it?

J.A.F.E.  has the colored tools, I think it's his camera.

It's likely to do with the background I use too. I think the color tends to shift the color balance a bit.