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About Us
Auckland’s Coin & Banknote Dealership
Aventine is an Australasian numismatic firm established in the 2010s as a private venture by a group of coin collectors. Over the past decade, we have become synonymous with exceptional numismatic rarities in New Zealand.
In 2021, we received our first international appointment as an Authorized Dealer for NGC (Numismatic Guaranty Corporation) and PMG (Paper Money Guaranty), the world’s most trusted third-party grading services for coins and banknotes.
Our acquisition of the 1879 Bank of New Zealand £100 banknote, which was formally sold for $85,000 AUD—the previous record holder for the highest price paid for a New Zealand banknote—was featured in The New Zealand Herald.
In 2024, Aventine expanded its global reach with a further appointment as the New Zealand Numismatic Agent for Spink & Son, further solidifying our position in the rare coin and banknote market for collectors in New Zealand.
We continue to serve as stewards of fine numismatics—highlighted in 2025 by the successful acquisition and repatriation of the first banknote issued by the Reserve Bank of New Zealand, as well as by the assessment of a newly unearthed c.1772 Resolution and Adventure Medal discovered in New Zealand that same year.
In 2024, Aventine expanded its global reach with a further appointment as the New Zealand Numismatic Agent for Spink & Son, further solidifying our position in the rare coin and banknote market for collectors in New Zealand.
In 2026, Aventine Christchurch was transferred into a newly established entity, C&B Auctions, introducing a revolutionary auction model to the New Zealand market with 0% Buyer’s Premium.
NGC Authorised Dealer · PMG Authorised Dealer · Fully Licensed Secondhand Dealer (New Zealand) · Sigma Metalytics Authorised Distributor · NZBN & GST Registered
