I am a beginner in collecting Australian stamps.
This stamp I think is Scott # 60 (perf.14.emerald and wmk.11)
The value 1/2 to the right of the stamp can be "1/2 thin" variety?
Thanks for the help.
Thanks simothecat.
I was so focused on finding the differences between numbers when it was very easy to google.
The difference is obvious to the naked eye