Oberndorf
i had a chance to get the J. P Clabrough book out to refresh my memory
the serial numbers restarted in 1884 - and numbers 1 to 5000 were made that year so - yours was made in 1884
Clabrough had their own factory at 15 Mary's Row, they did pay to use other's patents - that may explain the Greener feature (Greener was also on Mary Row, not sure of the timing)
i think your gun would be either medium plus or low end of the high grade. better mediums could have the lock fast, and drop points the higher grades would have scroll engraving, not birds, more elaborate checkering and gold inlays.
the insides of the locks might help - high grade's lock were burnished on the inside, well polished.
hope this helps
