I can't comment about the printing behind the diaphragm but Baumbach notes in his Columbia Phonograph Companion II that the earliest versions of the Analyzing reproducer did have a thumb screw rather than the spring clamp. Ron L -----Original Message----- From: phono-l-bounces at oldcrank.org [mailto:phono-l-bounces at oldcrank.org] On Behalf Of BruceY Sent: Sunday, March 23, 2008 12:13 PM To: phonolist at yahoogroups.com Cc: Antique Phonograph List Subject: [Phono-L] Columbia Long Throat Reproducer I recently acquiried a Columbia AH Graphophone. The reproducer is a long throat and the printing under the Micah, merely says Patented Nov. 18, 1902, other Patents pending, there is also a number on the back 43129 on the back and, It has a thumb screw, rather then a "clamp" style for the needle. Is this an early analyzing reproducer, or do I have something else here? Bruce _______________________________________________ Phono-L mailing list http://phono-l.oldcrank.org