Here are some of the DPL coins I've bothered to do images of:
10c 2005 Rev DP Lines

10c 2006 Obv DP Lines

50c 2001 CoF Rev DP Lines

50c 2001 CoF Rev DP Lines

50c 2001 CoF Rev DP Lines

50c 2003 Vol Rev D.Ck top left, DP Lines lower

50c 2003 Vol Rev DP Lines

50c 2006 Rev DP Lines above shield right

50c 2006 Rev DP Lines above shield Left

DPL are also found on:
20c Rev, under P'pus body looking like rather thick bars
5 cent, inside L elbow of Echidna - like thick bars
5 cent, under L claw of Echidna - like fine spears
Apec $1, a few very faint small ones, but I don't think I kept any
I'll see if I can rustle up some other images.
A friend is a present you give to yourself.
Nancy