Bill Plunkett showed me an unusual Ohio Brass M-3021. It is rare enough to have an Ohio Brass M-3021 (only one reported), but this one has the following incuse marking on the side of the crown: A C L no 2. M-3025A with A C L - 1 incuse marking has been found on a particular line in California. The line was Angel's Camp Line No. 1. Bill's M-3021 probably came from the second line called Angel's Camp Line No. 2.