The Bernstein edition is no real Limited Edition — the quantity of writing instruments produced is not limited — which dampens the collector price. For value determination, the established valuation guide in the collector scene is referenced, providing among other things comparison with current eBay auctions. Authenticity indications: on the fountain pen there should be a small gold sticker with the inscription 'B Germany'; the ballpoint typically carries no visible inscription. The correct spelling 'Montblanc' (not 'MONTblanc') is an important authenticity criterion — deviating spellings are often found on counterfeits.