Hi Anthony - well, you have certainly piqued MY interest with this ferry!!!!
That is a very old scratch built model you have there - obviously built by someone who had 'an affinity' to the Saint Germain!!!!
From your photos, she seems pretty accurate in the overall look - what length is the model? The real ship's particulars were:
Builders - Helsingor Shipbuilding and Engineering Co. Denmark
Yard no - 303
Arrived Dunkerque - 24 July 1951
Entered service - 28 July 1951
Finished service - 16 May 1988
Length o/a - 115.73m
Beadth o/a - 18.47m
Draught molded - 4.12m
Gross tonnage - 3094 (3492 from 1976)
Deadweight - 1299 (1331 from 1976)
Call sign - FNXF
Passengers - 850 (1000 from 1976)
Capacity - 12 railway sleeping cars and 12 luggage vans or 36 rail goods wagons or 135 cars on the train deck, 25 cars in the upper garage.
Engines - 2 x 9 cylinder 2 stroke single acting B&W engines developing 6400hp
Service speed - 16.5kts
More details from an excellent book called 'Saint Germain - Vintage Train Ferry' by John Hendy (ISBN 0951350633) - usually available from Amazon.
Very best of luck with the refurb - good to see more ferry models in existance
Definitely need a 'Ferry Meet' next year!!!
Carl