When you say shipping seal, do you mean the discs that identified tax payment on goods exported, or is it a seal as in security seal, to identify mail or strong boxes were not tampered with?
The copper coin looks to be company money, a trade token, they are collectible, best search old auction brochures to identify. ASC, Atlantic shipping company, or American or African https://www.baldwin.co.uk/tokens/
The seals are common, should be able to ID them from the Names / Language. Our Archive is not complete yet but there are a couple in it. Artefact Archive - MAARER