There is a very tatty Weber upright pianola for sale at the moment on
eBay.  I don't recognise the tracker bar arrangement, for as well as the
regular holes there are 16 pairs of extra hole in the centre.  I have
never seen this arrangement before and wonder what type of player it is.

Regards,
Chris Grant
Isle of Wight, UK

 [ Tracker bar on Aeolian Weber Pianola.
 [ http://www.mmdigest.com/Attachments/18/09/09/180909_150013_s-l1600.jpg