Got mum twenty kentes tipped. Out my own money. 4/7
My thoughts
I’m not sure what ‘kentes’ is it could also be ‘renten’ it’s a bit unclear but from what I have deduced I think he means he bought his mum 20 cigarettes which were filter tipped (she was a smoker). The 4/7 is probably how much they cost him – 4 shillings and 7 pence. There was a brand around the time called ‘Kensitas’ which he could be referring to and the price seems about right.