Took a mate to my secret spot. He pulled out 9 predecimals including some 1800s stuff. Whilst I didn't manage to hit 1800s I did get 5 predecimals.
1912 King George V Three Pence
1938 King George VI Three Pence
1907 King Edward VII Penny
1921 King George V Penny
Unknown Date (195?) Queen Elizabeth II Penny