Hi @RetroShirtsMan ,
You can access the collection saved in a product meta field by first assigning the collection in a variable as shown in below code:
{% assign mycollection = product.metafields["details"]["mycollectionfield"].value %}
{% comment %}
{{ mycollection.title }} - returns collection title
{{ mycollection.url }} - returns collection URL
{% endcomment %}
Please let me know if you need more help
Thanks