These were special purpose types that included the word CASSA or VAGLIA (Italian), CAISSE (French), CASH or C, and appear to have been used when an item was postmarked at a post office counter (especially on receipts). Before about 1880 they are found over­whelmingly on 20 pa. stamps. Type Cas-1 is known only from a cover in the Byam collection, from Alexandria to France by the French post; it cancels a 20 pa. stamp. This stamp should not have been needed, and it paid no applicable rate. Furthermore, Cas-I.5 is known with earlier dates than Cas-1.