Anne
You will find details of this in Jenny Thompson, The Identification of English Pressed Glass 1842-1908 ISBN 0 9515491 0 3
Page 12 and 13 Greener, there should be three numbers.
Reg No96775 27 March 1888 Rustic handle Reg No95935 16 Mach 1888 Glass pattern and 98551 21 April 1888, I have read (not sure where ) that this was a trade sample to show what Greener made.
Tony H in NZ