Blue bulls eye imprinted target with ledge head for early solid state Bally pinball machines.
May also use A-3944-4D.
Reference:
A-3944-4 drop target with blue bullseye
A-3944-0004 drop target with blue bullseye
AS-2795-3 target assembly
AS-2795-4 target assembly
AS-2795-5 target assembly
SP-100-314 target spring