"Clement Harold PETTMAN died 22 Nov 1965 aged 75y
Residence & Death Place: Tusmore
District Code: Nor
Book: 1A/Page: 7989" posted by Rhonda
Sands & McDougall
South Australia 1934
Pettman, C., rail emp, 15 Margaret St, North Kensington
Your grandmother was correct about his occupation but he joined post WW1.
The Register 23 Sep 1927
BRIBERY CHARGES - Betting in City clubs.......
P.C. Pettman Called.
Plainclothes Constable Clement Harold Pettman told Mr. Alderman that he was 38 years of age, and was married in July, 1918. There were two children. He joined the police force on September 1, 1919.