Australia 1963 Y. Halfpenny Error Struck on a 4.75g Planchet

Error: Struck on an underweight (Foreign) 4.75g planchet/blank VF

Country	Australia
Date	1963Y.
Denomination	Halfpenny
Obverse	Queen Elizabeth II - Design by Mrs Mary Gillick. Legend: ELIZABETH. II. DEI. GRATIA. REGINA. F: D: + Melbourne Die 7 - 110 rim beads.
Reverse	Kangaroo - Design by George Kruger Gray. Legend: AUSTRALIA - HALF PENNY - 1963 Melbourne Die B - Alternate large & small rim beads (106 of each)
Mintage	Perth: Circulation - 16,410,240 (Standard type) Unknown
Mintmark	Dot after Y of HALFPENNY on reverse.
Provenance	M.R.Roberts' W.C.C 2018 @$1000-VF