Greetings Richard:
Your Edison Standard is a Model B based on your serial number. The speed
control was moved underneath the bedplate and is a thumbscrew on the motor
frame that moves an arm with the governor pads on it.
The horn was an after market product since Edison provided the smaller 14"
witches hat brass-belled as standard equipment at the time your machine was
made. Your horn may be a little too heavy to hang on the neck of the
reproducer so you should see a ring on top for a horn crane.
The 2/4 minute gearing was later offered by Edison as a modification kit
when the 4 minute records came out. It came with a Model H reproducer to play
the 4 minute cylinders.
This is a good machine that will still be playing 100 years from now.
As a note to the list, the serial number of the Edison machines can guide
you on whether they have been assembled from several junked machines or are
original. Always ask for the serial number of an Edison then do your
homework.
Recently on eBay I saw a Standard machine with a Model B works in a Model D
case with a Diamond B reproducer in a horizontal carriage. The problem here
is that the machine had no 4 minute gears so one must assume they were
playing 2 minute cylinders with the heavy diamond point and destroying them.
Best Wishes,
Al
