I cannot see any tooling marks so I would have to say Grease Filled Die.
The Dies are wiped with Grease periodically and sometimes the Grease fills part of the design. I am no expert and I am sure others here will voice their opinions.
BTW welcome to the forum
The Dies are wiped with Grease periodically and sometimes the Grease fills part of the design. I am no expert and I am sure others here will voice their opinions.
BTW welcome to the forum





















