http://www.classictelevision.info/classic-television-database/

How do I advertise our rare classic cars, bikes, caravan, vehicles for television/film/advertising hire?
We own lots of really rare classic vehicles in the Essex area. They range from the 1930s, including English and American cars, British motorbikes and a 1966 English caravan. My other half restores classic vehicles to original standard for a living, and all our vehicles have been sympathetically restored (not modernised or modified). It would be great to earn some money to help pay for our own private vehicles upkeep. I assume there is some kind of database where people search, or do we approach individual film companies etc? Thanks for any advice.
Google TV Production companies. Plenty around. eg http://www.4rfv.co.uk/brieflisting.asp?scategory=912
Read all that small print at the end of period programmes to see who makes the ones that could use your vehicles, and make yourself known to them.
Good luck!
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