Washington Head: Denomination in Numerals: 6¢ Perf 12

6¢ Washington HeadPerf 12

US 336 - 6¢ Washington perf 12 D/L Wmk

Watermark Check – You will need to check the watermark on this stamp, however all the perf 12 stamps were printed by the flat plate method and there is no need to check printing method unless the stamp is suspect.

Watermark US Number
double-line 336
double-line (blue paper) 362
single-line 379

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