How to Identify Napco Ceramics by Marks & Numbers

Written by jessica johnson
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How to Identify Napco Ceramics by Marks & Numbers
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The Napco Company, or National Potteries Corporation, began production in 1938 and their products were extremely popular in the late '50s and early '60s. Napco produced figurines, collectibles, decorative glass and porcelain ceramics. Napco is still one of the most famous names for porcelain ceramics, antique pottery, vintage products and other collectibles. As collectors' items, it is important to identify NAPCO Ceramics by their marks and numbers.

Skill level:
Moderately Easy


  1. 1

    Turn the piece over and inspect the bottom. This is where the NAPCO transfer mark can be found. If you are purchasing online, request a picture of the Napco transfer mark from the seller.

  2. 2

    Inspect the sides of the piece. Napco used transfer marks as well as paper labels. A paper label should read, "A Napco Collection," "Napco originals by Giftware," "National Potteries Co., Cleveland, OH, Made in Japan," or "Napcoware, Import Japan."

  3. 3

    Identify the Napco sticker or transfer mark. The transfer mark should be under the glaze of the piece and read "NAPCO" or "Napco China." Numbers were also used to identify specific pieces, like an item number. Make sure this item number corresponds to the piece you are seeking.

Tips and warnings

  • Only buy Napco pieces from reputable dealers.
  • If you are concerned the piece may be a replica, or a fake, contact an antiques professional.

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