Welte-Philharmonic V-VI rolls of the 150 scale were made in three
formats.  The most common and that used for most of production were
simply referred to as "Welte" reproducing pipe organ rolls.  Most of
the 150 scale players that exist use this type of roll.

After Kimball purchased the assets of the Welte-Tripp Organ Co. of
Sound Beach, Connecticut in 1931, they continued with some of the
former Welte craftsmen to improve the Welte-Philharmonic.  They
introduced the "Kimball-Welte" format of Welte-Philharmonic with a new
lock and cancel arrangement.  Many rolls of this type have a KW prefix
before the number.

Lastly, Kimball introduced the "Standard" roll format which was
developed to play more than two organ manuals.  This was a significant
achievement in the Welte player system.  Sadly, this came at a time
when there were virtually no new organ installations requiring this
expensive three manual or greater player system.

The only organ I know to use Welte "Standard" rolls is the Vassar
organ.  The rolls were prepared from existing Welte masters and
recoded into the "Standard" format.  The "Standard" rolls I have all
have "ST" marked on the can.  I have perhaps a dozen different titles.
My "Standard" test roll is even marked "Vassar."  Mr. Bullock brings to
light a second Welte-Standard installation which was unknown to me.

While it is possible that a buyer of Welte-Philharmonic rolls might
stumble across Kimball-Welte rolls, the likelihood of finding Welte-
Standard rolls would be virtually nil.  As for me I am planning to set
up my Musicalle 10 roll changer as it was originally, to automatically
select between KW and Welte rolls automatically for my Welte-
Philharmonic organ.

Mark Reinhart