please let us know what Catalogue you use, when you ask for ID.
Your first stamp, was used in Tasmania, postmarked HOBART 3rd December 1917
Your second stamp Wmk is undecipherable, possibly a multiple crown.
We could probably confirm a date by the slogan Pmk "Always.....?"
Use (If safe to do so) lighter fluid to see the Pmk, or being a used stamp,
soak it in water for a few minutes.
This may assist?