It is 40" long, 20" high and 12" wide.
Output should be 110 Volts 35A.
Guessing it weighs around 120kg.
The dynamo came up in a conversation with a customer.
It looked interesting and the price asked makes for cheap fun, so I bought it.
Mrs M has spotted it in the garage already, mind you she did have to go around it to get some gardening kit out
I'll put a picture up later