Thank you fellows both!
It seems to correctly pin down the time period I will have to have the loco in hand for some better studying of characteristics , the kicker will appear to be what sort of governor it is runing ?
A wonderful find ... and challenge ... I think lol ...
Daniel .... I may have to take you up on your offer of the motor after I have got it here and had a good look ... I think I have your email , I will send you a test one and say hello to be sure
In other Bub related news I found a Bub automated roundhouse on German ebay .. the first I have ever seen for sale .. sadly a lot of other people saw it too , and its going to sell for well above what my cheapskate pockets can afford , but a bargain at any price I think simply for the rarity of the piece? ( if you have deeper pockets than me ... which isnt hard lol )
Anyone interested, its item# 174808354787 " Bub nr.856 Automatische Drehscheibe "