Constantin Coins

Auctions

Participate in our coin auctions

Discover Our Auctions

Our auctions bring collectors and consignors together. The coins on offer come from private collectors, estates, and institutional holdings – carefully vetted and professionally presented.

Our auctions take place on Biddr.com – an established platform for numismatic auctions. There you can view the complete catalog, place bids, and participate live.

Looking to consign coins? Learn more about auction consignment.

Current Auction

Auction 5 is live

Special Collection Poland, Ancient, German, and World Coins and Medals – 691 lots. Browse the catalog and place your pre-bids from today. The live auction starts on Friday, 9 October 2026, at 11:00 CEST.

To the Current Auction

Highlights from Past Auctions

All Auctions

27'000 EUR

Grossbritannien, Victoria 1837-1901, Crown 1847, London.

Prachtexemplar mit herrlicher Patina, winz. Kratzer, polierte Platte Im NGC Plastikholder mit der Bewertung PF 64 CAMEO (8583784-001)

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11'000 EUR

China, Provinz Kweichow, Dollar Jahr 17 (1928).

Auto Dollar. L&M 609. Leicht gereinigt, sehr schön-vorzüglich Im NGC Plastikholder mit der Bewertung XF DETAILS CLEANED (8583784-002)

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8'500 EUR

Baden, Ludwig Wilhelm 1677-1707, Goldmedaille 1955

Auf den 300. Geburtstag des Türkenlouis, 71,15 g, NGC PF 64 ULTRA CAMEO

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7'500 EUR

Polen, Stephan Bathory 1576-1586, Groschen 1580

Kopicki 498 (R7), von großer Seltenheit, sehr schön-vorzüglich

View on Biddr

Frequently Asked Questions

Everything you need to know about consigning and bidding in our auctions.

For Consignors

What can I consign?

We accept coins and medals from all eras and regions – from antiquity to modern times. Particularly suitable for auction are high-quality individual pieces, specialized collections, and well-preserved coins with collector value.

How does consignment work?

Contact us for an initial assessment – in person, by phone, or via email with photos. If we're interested, we'll discuss estimates and terms. You can bring your coins in person, send them insured, or we can pick them up from you.

What are the fees?

The consignor's commission is agreed upon individually and deducted from the hammer price. You'll know exactly what costs to expect upfront – transparent and with no hidden fees.

When do I receive payment?

Payment is typically made 4-6 weeks after the auction. You'll receive a detailed statement with all hammer prices.

What happens to unsold items?

After the auction, we'll discuss the next steps with you: items can be included in a subsequent auction, offered in post-auction sales, or returned to you.

For Bidders

How can I bid?

Our auctions take place on Biddr.com. After free registration, you can submit written pre-bids or bid live during the auction. All lots are available to view in the online catalog beforehand.

What is a "pre-bid"?

A pre-bid is your maximum bid submitted before the auction. The system automatically bids on your behalf – you only pay what's necessary to be the highest bidder, up to your limit.

What additional costs apply?

A buyer's premium is added to the hammer price – the exact amount can be found in the auction terms on Biddr.com. Shipping and insurance fees apply for delivery.

How do I receive my coins?

After payment is received, we ship your coins securely packaged and insured. You can also pick up your items in person by arrangement.

Is there an authenticity guarantee?

Yes. We guarantee the authenticity of all auctioned items.

Want to Consign?

We are continuously accepting consignments for our upcoming auctions.

Get in Touch