I am no authority but I recently sold SN W656ST (not whining, but goodness, it went for an extremely reasonable number).
Somewhere during the many years I owned it I found information on production years and frame numbers. Indications were it was assembled in 1972; and it is one of the higher frame numbers I have seen. The engine identification means very little, I think...it took five Sachs engine cores to assemble the nice running unit it is now. As most folks know the Penton/Wassell project was mostly taken on to use up excess cast iron barrel/head engines in Penton inventory. I believe the project was fairly short-lived. The resulting bikes were beautiful to look at but did not set any high standards in Observed Trials rideability. The enduro versions shared this trait, I'm told. Perhaps a more knowledgeable POG member can expand (or correct) what I have written.
Jim Schneider
Somewhere during the many years I owned it I found information on production years and frame numbers. Indications were it was assembled in 1972; and it is one of the higher frame numbers I have seen. The engine identification means very little, I think...it took five Sachs engine cores to assemble the nice running unit it is now. As most folks know the Penton/Wassell project was mostly taken on to use up excess cast iron barrel/head engines in Penton inventory. I believe the project was fairly short-lived. The resulting bikes were beautiful to look at but did not set any high standards in Observed Trials rideability. The enduro versions shared this trait, I'm told. Perhaps a more knowledgeable POG member can expand (or correct) what I have written.
Jim Schneider