Auction Series 257-264 in Zurich Day 3

1852: ½ b. grey-blue, a fresh vertical strip of six 'con interspazio di gruppo' between the fifth and sixth stamp, primarily with huge margins, tied by diamond grill to small cover from Imola to Rimini. Straight line IMOLA handstamp on front and corresponding "9 / APRILE" arrival datestamp on reverse. Multiple touched at top, base and lower right, neverheless an extraordinary usage. Cert. Sorani (1993). Sassone not listed; strip of five on cover = € 32'500; interspazio pair = € 3'250.
Catalogue 257: EUROPE & OVERSEAS