United States Postage Meter Stamp Catalog/GROUP OA – Official Armed Forces government business mail franks/Sub-group OA-ARM: Stamps used primarily for Army official business
Sub-group AR-ARM: Official Mail meter stamps used primarily for Army official business edit
- Some of these stamps are quite elusive but their actual rarity is not known.
Type OO-IE1, OO-A4 in 2001 edition
OA-ARM1. "6500" series.
- Corresponds to Types IE1, OO-A4.
- As previous OO-A types but the value box is much wider than tall.
- Meter numbers: 2310000, 6000000, and 6250000 series
- V/F: ≋ 0 .00 ≋ (range: .001 to 99.999)
- a. Town mark with U.S. ARMY at top, APO and 5-digit number at bottom