The Conn Artist ("Naked Lady"). There was some experimentation with different keyguards for the tenor and different microtuner-neck and over-the-top neck octave key designs for the alto, but the design of the 6/10/12M remained essentially the same from 1935 to 1959.
I have at least one example of the 6M model VIII, featured in the Gallery. This is supposed to be the best version of the 6M, as are horns produced with an "x" before or after the serial number. The former is a horn with a moderately modified neck design and is generally accepted as the best model of the 6M. The latter is generally considered to be an eXperimental design additional keywork, or vents, bore, etc.There are also horns that feature the standard "over the top" octave key design -- referred to as a "New York Style" neck. ALL the same pitches that were available during the age of the New Wonder were available through the Artist years, excepting the Sarrusophone, C soprano and straight soprano, it seems (the F instruments and C melody were available up until the start of WWII in 1941). However, horns other than the alto, tenor and baritone were essentially "factory original" New Wonder horns with different engraving and possibly keywork modifications -- and were special order, only. I have, at least, seen the bass in some 1960's catalogs and advertisements.
Please note that the "Naked Lady" model can be broken down into. Rolled tone hole models (1935 to 1947 -- generally regarded as the best horns). Straight tone hole models (1948 to 1959).Redesigned model with wire keyguards (1960 to 1971). Same as above, but with sheet metal keyguards and different bell-to-body brace (1963 to 1971). See below for more details. The 6M design was finalized toward the end of the Transitional period and the 12M design was finalized even earlier -- though both horns did have minor keywork changes -- but the tenor wasn't finalized until about s/n 263xxx, when its bell keys were switched to the RH side of the horn. This change announced the coming of Conn's most famous series of horns: the M series or "Naked Lady" model (so named for the engraving of a nude female portrait in a pentagon on the bell).
According to later Conn catalogs (after 1959), these horns are officially called the "Artist" or "Standard" model, but "Naked Lady" is the most commonly used name people use. Coinciding with the introduction of the 26M, the underslung octave key on the 6M alto is discontinued. It is brought back the next year.
The "over-the-top" octave key ("New York Style Neck") appears to then remain a custom option throughout the life of the 6M. This horn is IMMACULATE original lacquer. Great Charlie Parker sound, adjustable tuning on the neck. Mu personal horn and sad to see it go.
2 years ago after it had just been overhauled. I played it maybe 6 times since then, mostly playing my tenor sax. The item "Conn 6m Naked Lady Alto Saxophone-Vintage M275392A-1937 (without mouthpiece)" is in sale since Wednesday, July 31, 2019. This item is in the category "Musical Instruments & Gear\Wind & Woodwind\Band & Orchestral\Saxophones".
The seller is "piper44k" and is located in Quincy, Massachusetts. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.