Dear Daniel,  Most of the time the individual reed banks had a date
and the name of the person who voiced or assembled it on the lower
right hand side when looking from the front.  You will have to remove
the swell shades to see it.  Some times there is also a label from
the case department of the Vocalion Organ under the left cheek block.
You have to take out some screws under key bed, that go into it.
That is the easy part.

There is also a cleat that is attached to the under side of the inside
of the cheek block that also has two screws into the side of the case.
I found it interesting reading.  It indicated the dates that four coats
of varnish were applied and the dates each was rubbed out.  They were
all about a week apart over the course of a month.  I imagined as the
instrument was being assembled the cheek blocks were the last to be
installed.  That left a platform like an open desk across the front
to work from.

You have to imagine the key bed not being there at the time also.
That made it was easy to check the record of applications and schedule
the next procedure, making sure that everything was done.  Each step
was also signed by a supervisor insuring that it was okay.

These are a few places for you to look for dates.

Walter Kehoe
Syosset, New York