United States Postage Meter Stamp Catalog/GROUP OA – Official Armed Forces government business mail franks/Sub-group OA-FPO: Stamps with "FPO" (Fleet Post Office) in the town mark but without indication of which military service used the meter

Sub-group AR-FPO: Official Mail meter stamps with "FPO" (Fleet Post Office) in the town mark but without indication of which military service used the meter Some of these stamps are quite elusive but their actual rarity is not known. Type OO-IC4 or OO-A2.2 in previous editions 3 OA-FPO1. "Pitney Bowes 5313". Corresponds to Type IC4.1, OO-A2.2 (part). Value figures with wide wavy-line triad at left and no symbol at right (does not print fractions of a cent). When printing dollar values a narrow wavy-line triad appears left of the dollar number. right|150px Meter numbers: 8px 3020000 series V/F: 12px16px .00 12px≋1.00♦ 12px(range: 5px.01 to 9.99) ♦12px Stamps with dollar values show a small wavy-line triad at left of the dollar number. These stamps resemble Type OO-A2.1 stamps. They can be differentiated by the placement of the decimal and the right-most number. See close-up scans at right. a. Town and state at top of town mark, "FPO" and 5-digit number at bottom b. As a but with 9-digit number at bottom c. "FPO" and town name or abbreviation at top of town mark, 5-digit number at bottom d. As c but with 9-digit number at bottom Type OO-IE1 or OO-A4 in previous editions 3 OA-FPO2. "Pitney Bowes 6500" series. Corresponds to Type IE1, OO-A4. As previous OO-A types but the value box is much wider than tall. A. Wavy lines at left in value figures, 2mm tall (≋) Meter numbers: 6250000 series V/F: 12px≋ 0 .00 ≋ 12px(range: 5px.001 to 99.999) a. Town mark with town and state at top,FPO and 5-digit number at bottom b. As a, but with 9-digit number at bottom c. Town mark with FPO and town designation at top with 5-digit number at bottom d. As c, but with 9-digit number at bottom e. Town mark with FPO AP or FPO AE at top, 5-digit number at bottom f. Town mark reads:12pxFPO SAN FRANCISCO / 96654 (without state) 12px(6250128)