Check List & Usage Data
CZSG Check List
- Revised CZSG Check List updated June 2016.
Revised and Augmented Plating Tables
by Geoffrey Brewster- Plating Table 5, Stage I of the Third Series: Revised Table of Plating Characteristics on Scott Nos. 9–10 and 12–15
- Plating Table 6, Stages II–VI of the Third Series: Revised Table of Plating Characteristics on Scott Nos. 9–15 and 18–20
- Plating the PANAMAs of the Fourth Panama Carmine Narrow-Bar Stamps of the C.Z.Third Series
- Plating the PANAMAs of the Fourth Panama Red-Brown Narrow-Bar Stamps of the C.Z. Third Series, with Comparison to the Carmine Narrow-Bar Stamps
- Varieties of the PANAMAs in Form 3 of the 4th Panama Issue on the C. Z. Third Series
- Spacing between Narrow Bars and the PANAMAs of the C. Z. Third Series
- Bar Gaps on Narrow Bars and the PANAMA Overprints of the C. Z. Third Series
- Recorded Bar Gaps of Panama Overprint Form 3 on the C. Z. Third Series
Usage Data
- Census of Canal Zone Second Series Covers (November 2018)
- Earliest Known Stamp Use by CZSG catalog number (March 2019)
- Canal Zone Domestic Rates
- Census of Dated Usage of Type III Overprint issues (March 2019)
- Census of Perf P and PSN Covers (April 2019)
- Project: covers needed from 18th Infantry Brigade, 1939-1940