Hi Willip,
I’ve received an answer back and it seems unlikely that A17-503 ever wore a silver scheme. The consensus agrees that by that stage of the war an all over yellow scheme with black serial and nose numbering would be the most likely.
I can email you a file that I was forwarded with some images from the AWM of Tigers from that era if you’d like. Below I have attached a copy of the RAAF data card for A17-503.
[ATTACH]159264[/ATTACH]
Cheers
Owen