Meter cancellations on commercial covers accumulation 1950s/1990s, many airmail to Australia or to 'Santa Claus' (!) in Finland, includes many early NCR types in addition to Pitney Bowes, Hasler and Anker, some advertising formats, additional interest in Registereds (over 40), Express (10), high rates, postcard and 'Petit paquet' rates, suitable lot for specialists' study, with photocopy of definitive catalogue on the subject (160)