When George and I wrote up the Standards we did not have a large data base
or a great number of examples of the E. Many years and observations later,
I find that the E, which was introduced while the D was still in production,
appears both with the blocked gear and configured with a 4 minute only
gearing. I see no reason you cannot put D gears into the E for both record
lengths. The Model F appeared at the same time as the E but the D continued
for
a time, disappeared then came back as an ICS machine just before outside
horn machine manufacturing ceased. Thus the gearing from a junked F should
also give you the dual record capability you desire.
BTW - the printer never did get all the Standards put in the right place in
either the first book or George's Companion book. In the Companion book
the Model C Standard is really my early D in the 'tall' cabinet carried over
from the B & early C. In the original book no Model B, Edison's most common
machine, is shown as my Model C with dual gearing is labeled as such. My B
appears in the Companion book labeled correctly.
Hope that helps...
Al
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