The horns with the "E" in the serial number use the European concert intonation standard of A=442hz.
1976 Catalog and Price List
Bb Soprano (straight) 27527E (1977)
Bb Tenor - sn 32075 - 1981 - Lacquer - From heidelberg-smurf on eBay.de
Eb Alto 31426E
Eb Alto Serial # ?
Eb Alto Serial # ?
Eb Alto 23xxx (1975)
Eb Alto 29xxx
Straight Bb Soprano 25369
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