Hi Robbie,  Alas, I've none of the missing roll numbers you mention,
but have sent your note about them to George Fleming, the PPG
membership secretary/archivist.  He also collects, and has a large
number of Ampico rolls.

I did notice in the 30000-40000 series of Ampico rolls :

  Second Hand Rose - Clarke-Hanley, played by Vincent Youmans

Published by Play-Rite Music Rolls and had no date.  On the roll it
says 1979, and the number on the roll is actually 301061 (on the left
of the roll) and 177 (on the right of the roll).

Christine Robinson

 [ Might 177 be a date code?  -- Robbie