So I bought an old timers stamp collection and these Matilda 1980 sets on an unused sheet were among what I got. The question is will Australia post still allow these stamps as postage if I use them on mail outs today? Or will AP reject them? They have never been used and I cannot see any guides on if one can use older unused stamps as long as they are still decimal currency. Does anyone know if I can use these mint stamps from 1980 for postage today?
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