Stamp catalog : Perforations List [Theme: Mathematics | Printer: None] : Colnect 📮
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13 x 13¼ (1)13½ x 12 (1)13½ x 13¼ (5)13½ (1)14 (3)14¼ (1)14½ x 14 (1)14½ x 14¼ (1)Die Cut (1)Die Cut 10¾ (2)Harrow 11 (1)Harrow 11½ (1)Harrow 12½ (2)Imperforate (4)Simulated (7)Syncopated 13¼ x 13 (2)Syncopated 13¼ (17)Syncopated 13½ (2)comb 11 x 11½ (1)comb 11½ x 11 (1)comb 11½ (3)comb 11¾ x 11¼ (1)comb 12 (8)comb 12¾ x 12½ (1)comb 13 x 12½ (1)comb 13 x 13¼ (1)comb 13 (3)comb 13¼ (4)comb 13½ x 13¼ (1)comb 13¾ (14)comb 14 x 12¾ (1)comb 14 x 13½ (7)comb 14 x 14¼ (1)comb 14 (1)comb 14¼ x 13¾ (2)comb 14¼ (4)line 10½ (1)Unknown (5)