United States Postage Meter Stamp Catalog/Sub-group PD-H – Digital P.O. counter label with "PD" in town line, MOS-UNISYS

Sub-group PD-H: Digital P.O. counter label with "PD" in town line, MOS-UNISYS

 * Although not intended for collecting Postage Due, the MOS/UNISYS Postage Validation Imprinter system was used occasionally for that purpose in some post offices. Only one such machine is known to have been specifically labels as a Postage Due franker.

Unlisted in the 2001 edition '''PD-H1. MOS Corporation/UNISYS''' (digital). [RRRR]
 * Type PO-B6.1 with town line "TAMPA PD BR.FL".
 * At least one of the PVI machines used in Tampa, Florida has "PD BR" (for Postage Due Branch) in the town line. Although other PO-B6 type PVI stamps have been used to collect postage due, the Tampa example is the only one known dedicated to collecting postage due and indicating so in the town line.
 * V/F: MeterCat 5 spaces.jpg$0.00 MeterCat 5 spaces.jpg$00.00

NOTE: A similar Postage Due stamp based on Type PO-B6.4 may exist but has not yet been reported.