The vessel depicts on this stamp and MS is the MARIA CRISTINA built in 1916.
Length 19 meter and can carry 15 passengers.
Used in the mail and cargo service between Madeira and Port Santo.
1951 Fitted out with an engine.
1953 Passenger capacity increased to 45.
1967 Lengthened to 35 meter.
1983 Stranded.
Madeira 1988 80e sg 238, scott?
Source: Watercraft Philately 1989 page 54.