On the back of each piece there are a series of numbers that convey certain information about that piece. These numbers are used to document the piece's location and when it was completed.
Coordinate # 5N/1W-47
Production # 842
Group # 119
Coordinate # - Indicates the sheet of plywood from which that particular piece is cut. It locates its direction and distance from CENTER. It is followed by that piece's number within that sheet of plywood.
Production # - the order in which all the pieces are created.
Group # - the order in which that group is painted/completed. This is also the number that is indicated in the title of each piece.