Conn was not entirely consistent with its allocation of model numbers.
My brass instruments' galleries, organised as Yahoo groups, have this index entry holding material on the 38K:
Conn bass instruments’ catalogue from December 1934. Thanks to the generosity of Rob Perelli-Minetti the YMPP project can present scans of a December 1934 Conn bass instruments brochure. 14 pages in B/W (1590K):
http://groups.yahoo.com/group/YorkMaste ... ochure.pdf
Klaus Bjerre of Denmark
Retired teacher
40MB+ of free music files in .pdf format:
http://groups.yahoo.com/group/YorkMasterBBb/files/
(Approved membership required)
Index over 1GB+ of brass instruments galleries and catalogue scans:
http://groups.yahoo.com/group/YorkMaste ... III/files/
(Membership is open for all)