Please let me say thanks for posting these highly interesting pieces!
I fully agree with you: There are lots of instances, from Indian matchlock muskets, flintknapping combination tools (see attachments) to ball molds in which North European Late Gothic and Early Renaissance influences and decorative styles have been adopted and copied in oriental regions at some later date. Had we not additional information as to finds and provenance, it would in many cases almost be impossible to make a correct attribution.
For instance, your fine gang mould shows exactly the style of North Italian and German Early Reniassance decorative pattern as does a small barrel scourer in my collection which I date to the first half of the 16th century and which was excavated nearby where I live in Bavaria a few years ago - see attachments.
It's really hard to tell, I have to admit.
This, I feel, could, thanks to your attribution, kick off a highly interesting intercultural discussion on stylistc similarities across all boundaries.
Thank you once more.