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Centennial 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  


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