The following statement is from the Circulumancer wizard archetype's ability, Ringbearer.
A circulumancer may add additional magic abilities to his bonded ring as if he has the Ring Apprentice Feat, replacing this with the Forge Ring feat at 5th level. The circulumancer’s bonded ring possesses the unique ability to be enchanted as multiple magic rings at once
My question, regarding the bolded portion, is are there any limitations? Given the funds and time, could a wizard make this ring function as a ring of wizardry I,II,III, and IV? Could it be enchanted to function as multiple rings of counterspell , or spell storing giving you a magical battery to fill with spells to your heart's content?
Probably yes. As a 3rd party product there's even less attempt to balance the archetype than in Paizo's offerings.