There is only one obverse and one reverse issued for the
sixpences of the George I reign.  They all however have  
different issue marks in angles on the reverses.
Roses & Plumes - silver from "Company for smelting down
lead with Pitcole and Seacole"
SSC - silver from the South Sea Company.

The obverse was by John Croker and the reverse was by
Johan Ochs senior.
GEORGE I SIXPENCE
1716-1726
George I Sixpence
1716-1726
Courtesy of CNG
www.cngcoins.com
Roses and Plumes, & SSC
GEORGE IV
GEORGE III
GEORGE II
GEORGE I
ANNE
WILLIAM III
WILLIAM & MARY
VICTORIA
EDWARD VII

ERROR COINS
GEORGE V
GEORGE VI
WILLIAM IV

EDWARD VIII
GRADING COINS
PATTERN COINS
CROMWELL
JAMES II
CHARLES II
1717-1726 Silver, 3 grams, 21mm Diameter.