Auction UPA 93

2p 50c brown postal stationery notification envelope (H&G NB1) with 'CORREOS NACIONALES SERVICIO INTERIOR' overprint in black (Guatemala Handbook Type F) with the form number overprinted at lower left. A fine used example with GUATEMALA CITY machine cancel dated OCT 10 1931. Addressed locally within GUATEMALA CITY. A scarce type. {U} (Start Price / Minimum Bid = £48.00)