Lot
1594 
Sunday School Postage (Philadelphia, Pa.), 1874, red, group of six covers bear this red "Postage" label, most addressed to Mrs Martin (Sunday school teacher) at the Sunday School Post Office, four canceled with blue circular "Sunday School, First City Baptist" handstamp, one pencil canceled and one (preprinted with matching enclosure) with black "Sunday School, Post Office" circular handstamp, also includes an additional off cover stamp, F.-V.F., a very scarce group. Estimate $400 - 600.
Realized: $230