This is an Edison Standard B from around 1907.  Introduced in 1905 early B's retained the banner decal of the A but later this was replaced by the single word "Edison" decal.  Just when this occurred I know not but given that the Model C was introduced at the beginning of 1908, 1907 seems a good compromise.  The B was very similar to the A except for better suspension of the motor below the bed plate.  Springs were introduced to replace the rubber washers of the A which meant the case height needed to be increased.  In addition the speed adjuster was moved to below the bed plate.

My Standard B came with a Pathe, spun aluminium horn but it is shown in the photo opposite with a reproduction witches hat horn and also in the photo gallery with a repainted horn from a cheap crapophone* adapted to fit the C and H reproducers. The B had been fitted with the optional Combination Attachment for playing 2 and 4 minute cylinders.