This set of inflation overprints came into use in late October-November 1923.
Numerous varieties exist of several of the issues due to varying printing methods and perforations.
The P-suffix issues are flat plate printings and the W-suffix are rotary press printings. They can be distinguished by the size of the printed area:
- P — 17.7 mm x 21.5 mm
- W — 18.0 mm x 22.0 mm
The A-suffix issues are perf K 14:14.25, and the B-prefix issues have rouletted perfs.
Two recurring plate flaws exist across the issues. The first is a broken (“sprung”) rosette on the left of the design, denoted by the “HT” suffix. This plate flaw can be found at positions 12, 18, 63, & 68 of come printings.