Frederick Post Co. - Chicago, Illinois
Scales: C-C1-C1F-CF-D-DF-K-L-LL0-LL1-LL2-LL3-LL4- LL00-LL01-LL02-LL03-R1-R2-S-ST-T
Overall length: 12.5 inches (Ruled portion = 10 inches)