Photos and links collected by concertina maker Christy Hengel of Minnesota and his friend Loren Schaeffler.

Covers history, types, makes, repair and dealers.

Documents for the study of English, Anglo, and Duet concertinas: history, instruction books, sheet music, patents, technical papers, rare periodicals, and new research by many leading scholars. Full texts to read, download, and print.

Resources for novice players of the American Chemnitzer Concertina .

A complete resource for the anglo concertina enthusiast .

A guide to various chords, listed by type.

Internal details about the concertina, information about specific concertina types, and information about stolen concertinas.

The Web resource for free sheet music with special notation for the Chemnitzer Concertina.

Colour scans of C. Wheatstone & Co. production and sales ledgers, from the concertina document archives of the Horniman Museum in London.

Authoritative source for the instrument patented in 1884 by John Hill MacCann. Offers complete scanned instructional booklet published by the inventor in 1902.