H & H are holding their beloved auction at the National Motorcycle Museum on the 9th December 2017.
A number of worth period pieces for the inter war years can be seen including a BMW R35 from 1939 and a Velocette MOV from 1938 which appears to have had only two owners since new.

photo – NSU OSL 251 Sport 1938 – (HH Auctions)
My attention was however drawn to Lot 33, this delightful German NSU in the above photo and very much a dream ISDT machine of the inter war year German motorbike industry. From Germany there is little detail of its heritage but it clearly could have given a good performance in the ISDT with an estimate of £7500 – 8500 with bidding starting at £3750 I can see it being a popular piece for any off-road heritage collectors