Centennial Definitives, 1967-1973
Earliest Known Usages
Updated: Jan 10, 2001
From time to time stamps are released that do not have an official first day of issue. In fact, in some cases, a new printing may appear that is never recognized as existing by the post office!
Collectors, however, like to know when a new printing is released. For those stamps that do not have an official first day of issue, an earliest known use (EKU) is required.
The following is a list of some of those stamps in this series that did not have an official first day of issue -- they just appeared! Can you supply a new EKU?
OP-2 Tagged:
| Stamp | Unitrade | Suggested date of issue | EKU | Revised |
| 1¢ | 454piii | Nov 71 | Jan 2/72 | |
| 2¢ | 455piv | Dec 72 | Jan 4/73 | |
| 3¢ precancel | 456pxx | Apr 73 | ||
| 4¢ | 457piv | Apr 73 | Jul 19/73 | |
| 6¢ black, CBN die, perf 11.8 | 460fpi | Feb 72 | Mar 3/72 | |
| 10¢ Jack Pine | 462piii | Feb 72 | Apr 19/72 | |
| 15¢ Bylot Island | 463piv | Feb 72 | Mar 9/72 |
Hi-brite:
| Stamp | Unitrade | Suggested date of issue | EKU | Revised |
| 1¢ | 454ii | Jun 71 | Jun 21/71 | |
| 1¢ Wpg 1-bar tag | 454pii | Sep 71 | Oct 30/71 | |
| 5¢ | 458iii | Dec 71 | Jan 24/72 | |
| 5¢ precancel | 458xxi | Aug 9/72 | Dec 14/71 | |
| 5¢ Wpg 1-bar tag | 458pii | Dec 71 | ||
| 6¢ orange, perf 12.5x12 | 459biv | Aug 69 | Jul 30/69 | |
| 6¢ orange, perf 12.5x12, Wpg tag | 459bpii | Dec 69 | Nov 19/69 | |
| 6¢ black, Die I, perf 12.5x12 | 460ii | Jan 7/70 | Jan 7/70 | |
| 6¢ black, Die I, perf 10, booklet BK61 | 460giii | Dec 17/70 | ||
| 8¢ Alaska | 461ii | Jul 71 | Jun 71 | |
| 10¢ | 462iii | Nov 71 | Nov 30/71 | |
| 10¢ Wpg tag | 462pi | Jan 72 | Jan 29/72 | |
| 10¢ OP-2 | 462pii (HF) | Dec 14/71 | Apr 19/72 | |
| 15¢ | 463ii | Mar 71 | Mar 27/71 | |
| 20¢ | 464ii | Aug 71 | Oct 1/71 | |
| 25¢ | 465ii | Oct 71 | Sep 13/71 | |
| 25¢ Wpg tag | 465pi | Sep 71 | Dec 8/72 | |
| 50¢ | 465Aiii | Mar 71 | Feb 9/71 | |
| $1 | 465Bii | Mar 71 | May 26/71 | |
| 6¢ orange coil | 468Ai | Dec 69 | Jun 28/70 |
Fluorescent Ink:
[This was not listed on Page 13, but is certainly applicable.]
Stamp
Unitrade
Suggested
date of issue
EKU
Revised 6¢ orange, perf 10, sheet
459ii
1969
Nov 15/68
Nov 1/68 6¢ orange, perf 10, booklet
459vii
1969
Feb 9/69
