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OLDS Model Information Model ..... # ..... Bore ..... Bell Size .. Comments Standard M-7 .485/.500 7 Tuning in Slide ^^ LM-7 .495/.510 7 ^^ LM-7.5 .495/.510 7.5 ^^ L-8 .510-.525 8 Available W/ F Military S-6 .485 6 Modern Trombone ^^ S-6.5 .485 6.5 ^^ M-7 .485/.500 7 ^^ LM-7 .495/.510 7 ^^ LM-7.5 .495/.510 7.5 ^^ L-8 .510-.525 8 Available W/ F Radio Model R-7 .510-.525 7.5 Compact ^^ R-7.5 .510-.525 Self Balancing M-7 .485/.500 7 Like Military W/ Weighted Braces ^^ LM-7 .495/.510 7 ^^ LM-7.5 .495/.510 7.5 ^^ L-8 .510-.525 8 Available W/ F Large Tenor - .547 8.5 F Bass - .565 9 F F & E Bass - .565 9 F ,E Ambassador A-15 .485/.500 7.5 Ambassador A-20 .510/.525? 8.5 Studio T-15 .485/.500 7.5 Nickle Silver Bell on Brass Bell Branch Super S-15 .485/.500 7.5 Heavy Red Brass Bell & Tone Ring Super FW SF-15 .485/.500 7 Light Red Brass Bell & Tone Ring Super Large S-20 .547? 9 F Heavy Red Brass Bell & Tone Ring Super Bass S-22 .565 9 F Super Bass S-24G .565 9 F, G Recording R-15 .495/.510 8.5 Red brass bell. Recording R-20 .495/.510 8.5 F Red brass bell. Custom P-15 .485-500 7.5 Yellow Brass Custom P-16 .500 7.5 Opera O-15 .547 8.5 All Nickle Silver Thin Bell Opera Fanfare O-115 .547 8.5 Yellow Brass Horn Opera O-23 .547 8.5 F All Nickle Silver Thin Bell Superstar V-20 .495/.510 8.5 F Silver plated. Symphony O-25 .554 8.5 F Red brass bell. George Roberts P-22 .565 9 F Light Yellow Brass Bell GR Bass P-24G .565 9 F, G 2nd Trigger on 1st Finger Superstar V-25 .565 10 F, E Silver plated. Valve O-20 .500 7.5 Valves fit all –15 and most –20 bells Marching O-21 .500

The Special The Special was a intermediate horn that was a take off of their old 'Military' model.	The Studio The Studio was a inovation of Olds. It used a nickle-silver bell (brass without copper) on a yellow brass bell neck, giving it a very unique darker tone without the weight of a heavy bell. Interesting look, anyway.
The Super The Super is the small Profession line horn. It had a very heavy bronze bell with a "Tone Control Ring" that made the bell even heavier. The result is a very dark and centered tone for a small conical horn - my favorite.	The Recording The Recording was a very popular Profession horn. Made with a bronze or red brass bell, it has a very dark and lively sound.
The Recording The Ambassador was their very well built student line horn. Well built slide and very good projection.	Olds Standard - 1927 Some of the feature that Olds invented: Slide Lock Slide to bell lock nut. Tuning slide in bell crook.
Olds Trombone Serial Number Dates 260 - 1915 1260 - 1920 2500 - 1925 6000 - 1930 6400 - 1931 6700 - 1932 7250 - 1933 8000 - 1934 8750 - 1935 9500 - 1936 10250 - 1937 11000 - 1938 11750 - 1939 12500 - 1940 13250 - 1941 14000 - 1942 - 1943 - 1944 - 1945 15000 - 1946 21000 - 1947 28000 - 1948 36000 - 1949 45000 - 1950 56000 - 1951 73000 - Mar. 1952 80000 - July 1952 90000 - Feb. 1953 100000 - Oct. 1953 150000 - Aug. 1955 200000 - Nov. 1956 250000 - July 1958 300000 - Sept.1959 350000 - June 1960 400000 - Mar.1962 450000 - Feb. 1964 500000 - Feb. 1965 550000 - June 1966 600000 - June 1967 650000 - June 1968 700000 - June 1969 750000 - June 1971 800000 - June 1972 850000 - Oct. 1973 900000 - Nov. 1974 950000 - April 1976 970000 - Sept. 1976 990000 - Mar.1977 999999 - Sept. 1977 SN#1,000,000 Was a beautiful Silver Super ingraved with "One In A Million" and presented to Larry Minick.