Kondia FV-1 Turret Milling Machine Timing Belt. The dimensions are as follows: Length about 592 mm;  width 28.7 mm (this might be slightly less than the belt fitted by the makers); number of teeth 42 (the tooth form is slanted with a top width of about 4 mm) tooth pitch about 13.7 mm. 
Later models of the FV-1 might have had a tooth form that was "half-round". If yours is like that, please phone 01298-871633 or email tony@lathes.co.uk for details.