This is a reverse die trial for the 1922 Grant Memorial half.
It is known on the following combinations.
Silver or silverplated copper JA1922-6/P3569 ex Bullowa, ANS.
Nickel JA1922-7/P3572 ex Fraser, Terrell-Bowers and Ruddy 5/73, 96 ANA.
Silvered white metal JA1922-8/P3575 is unconfirmed and is probably a misdescription of JA1922-6/P3569.
Photo courtesy of Heritage.