'42 7' prop manufacturer?

[doczippy]

I am looking at purchasing a wooden prop and I am just trying to get some history on it. The manufacturer stamp is a small RCO with a large LL placed over top. There is 4 lines engraved in it: LL-(M?)-279
DES 86 M54
RPM 2220
Aug 42

I don't have any pictures that I can upload at this time but it has 8 bolts and what looks like brass on the leading edge and tips. Thanks for any comments.

[roland.t.reimer]

some info:
RLLCo on the manufacturer decal is Robert Laidlaw Lumber Co, a major supplier to deHavilland.

86 inch prop 54 degree pitch

"Distinguished Toronto-born test pilot, aeronautical engineer, and aerospace industry executive, William Robert "Bob" Laidlaw donated his restored Tiger Moth to the Toronto Aerospace Museum."

[doczippy]

Thanks for your help. Turns out the prop got sold to someone else.