Lot 19031908, 1¢ green, tied by "Mont Alto, Pa. Oct 18 1909" duplex on post card to Clearfield Pa., clear strike of "DISINFECTED." straightline handstamp; some edge wear, Very Fine and scarce.
Scott No. 331 Estimate $150 - 200.
The Tuberculosis Sanitarium located at Mont Alto Pa. was one of three large TB sanitariums located in the state that treated thousands of patients. All mail was disinfected to prevent the spread of the disease.