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History of the manufacturer  

Supreme Instruments Corp.; Greenwood (MS)

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Name: Supreme Instruments Corp.; Greenwood (MS)    (USA)  
Abbreviation: supreme-in
Products: Model types Others

Supreme Instruments Corp., Greenwood (MS)

Founded: 1926
Supreme Instruments was formed in 1926 in Greenwood Mississippi by Jewell R. Williams that owned the company until the 1930's. In those early years, Supreme designed and produced many of the radio analyzers, multimeters, and tube testers used by radio repair shops and radio service men.
B.F. Dulweber took over the company in the 1930's when founder Williams left. He was assisted at Supreme Instruments by his son D.N. Dulweber. B.F. Dulweber was the owner of the "Kratzer Cured Lumber Company" from 1925 to 1929 in Dulweber (MS). The engineering staff at Supreme in the early 1930's were Vivion A. Johnson and Floyd Fausett. They each applied for and held several patents.
In 1938 E. G. (Grady) took over the engineering staff.
In 1947 Grady purchased Supreme Instruments. Supreme did not use production line methods to manufacture equipment. Each unit was assembled from start to finish by one worker. A signature of the Supreme employee that assembled the tester can often be found inside the case. Production line techeniques were not implemented at Supreme until World War II when war needs dictated a higher production rate.
During the war Supreme stepped up production and produced over 1500 panel meters a day. Over 200 units per day of the model 542 volt-ohm meter were also manufactured for the war effort.
In 1956 Hickok purchased Supreme Instruments Corp. The Hickok Inc-Supreme Electronics Div. still exists today in Greenwood Mississippi and manufactures automobile test equipment. (Information from Steve Johnson's Supreme Instruments Collection).

Some models:
Country Year Name 1st Tube Notes
USA  30 Tube Checker 19   Händlerpreise: 27 USD (Counter Type) / 30 USD (Portable Type). 
USA  32 Ohmmeter 33    
USA  33 Free Reference Point Tester 333   analizzatore 
USA  28/29 Diagnometer 400-A   1 Voltmeter, three scales of 0/10/100/600, 1000 ohms per volt. 1 Mil-ameter of 125 mils... 
USA  29–31 Radio Diagnometer 400-B   The Supreme Diagnometer model 400-B was at least sold in 1929 and 1930 - we don't know yet... 
USA  32 Volt Ohmmeter 44    
USA  32 Oscillator 60    
USA  32 TubeTesting Unit 62    
USA  30 Oscillator 70 30   
USA  32 AC-DC Volt-Ohm-Milliammeter 75    
USA  30–33 Set Analyzer 90   Can be earlier than 1930, but evidence is 1930 to 1933. Later prices: $ 78.50, 77.90. 
USA  28/29 Tube Tester 99-A Supreme   1 Voltmeter, three scales of 0/10/100/600, 1000 ohms per volt. 1 Mil-ameter of 125 mils... 


Further details for this manufacturer by the members (rmfiorg):

Supreme inst. as one of Hickok subsidarys in 1969 adtbn_hickoksubs.jpg
Scanned from the Radio Retailing July 1946 page 169.tbn_supreme_prom_rr_jul46_p169.jpg
Scanned from the Radio Retailing January 1947 page 142.tbn_rr_jan47_p142.jpg
Scanned from the Radio Retailing October 1928 page 21.tbn_rr_october28_ad_supreme_p21.jpg
Scanned from the Radio & Television Retailing April 1947 page 138.tbn_rr_apr47_p138.jpg
Scanned from the Radio & Television Retailing June 1947 page 152.tbn_rr_jun47_p152.jpg
Scanned from the Radio & Television Retailing July 1947 page 123.tbn_rr_jul47_p123~~1.jpg