Avbstamps

Victor Bove, serving collectors since 1960

Major Perforation Varieties

"H" Perf. 11.2 x 11.2

"L" Perf. 11 x 11

"EL" Perf. 10.5 x11.25

There are 3 major types of perforations.

L or l = L perforation - perforated in row stage operation. This is in the shape of an "L". It's characterized by overlapping holes. All margins are perforated through. P-11x11, (exactly 10.94x10.94).

EL or el = Electric Eye Perforation: "L" type margins are not perforated completely through. P-11x10.5, (exactly 11.25x10.5).

H or h = Horrow Type Perforation: also called "on press", "in line", "bullseye" perforation. Characterized by perfectly intersecting holes. P-11.2 x11 (Exact (11.25x11.25).

Examples of Perforation Varieties

1580	(EL),L,H	1844	(L) PL. #1	1894 DG	(L)
1596	(L),H	1844	(L) PL. #2	1951	(EL)
1622	HUCKPRESS	1844c	(EL)	1951a	H
1622c	(Giori Press)	1862	(L),H	1953-02a	EL,(H)
1711	(H),L	1863	L ,H	2535	EL, H = P-13
1735	(L),H	1864	(L),H	C98	H
1789	(P-11)	1867	(L),H	C98a	(EL)
1789	P-11 x 12	1868	(L),H	C108	H
1795-98a	(H),EL	1869	(L),H	C108a	(L)
1844	H	1894 SG	H	C128	H, (L)

(!) = Better examples