Type Check - The offset method, found only on the perf 11 and imperforate stamps, can be one of five types, Type IV, V, VA, VI,  or VII.  It may be helpful to remember that only offset stamps can be of types IV-VII and that offset stamps can only be type IV-VII. At the risk of belaboring the point, flat plate and rotary stamps can only be types I-III and never types IV-VII. It may also be helpful to remember that the imperforate offset stamps follow the same type designations and numbering sequence as their perf 11 brethren.

Type Perf 11 Scott Number Corresponding Imperforate  Scott Number IV 526 532 V 527 533 VA 528 534 VI 528A 534A VII 528B 534B

Identification guide for the types of the offset stamps Washington Franklin Identifier - Home Page

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