Janesco cards appear to have been used in the early 1950s.  All are black and white RP cards.
AYARC50 Arch Bay, Alderney AYGEN05 Corblets Bay, Lighthouse, Hannaine Bay, Crabby Bay from Fort Grosnez, and the Harbour.  1950
AYCLQ50 Fort Clonque, Alderney AYHAR50 Hanging Rock, Fort Essex from Raz Island, Alderney
AYLON50 Longis Alderney AYSTA51 Rue Grosnez, Alderney
(Victoria Street - archaic usage of original name)
AYHBR50 New Harbour, Alderney AYBUR55 Alderney from Burhou