"SRC Control-Dated Canal Zone, Stamps" by Jerry Craig, 1999, 26 page booklet regarding a 1938 law addressing the problem of pre-canceled stamps being reused on mail. This booklet illustrates the various types and and sub-types of pre-cancels used by Sears, Roebuck and Co. (SRC) to combat this problem, as well as which stamps were known to be used with each type and sub-type. An excellent, in-depth study of this specialized collecting area. Book in excellent condition

$20

WESTPEX 1988 Program, Booklet, excellent condition with minor scuff at bottom right corner (Image)

$10