C. G. Conn

BRASS INSTRUMENT MODEL NUMBERS

And

DATES OF MANUFACTURE

1919 -- 1965

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BORE SIZES, BORE DESIGNATIONS and MODEL DESIGNATIONS for Conn brass instruments
CONN BORE-SIZE DESIGNATIONS:
	Conn bore sizes, as shown on its brass instrument model designation list, are
coded as a whole number, or a number and fraction (e.g., 1 1/2). The attached chart
translates these to decimal-inch and millimeter dimensions.

	Conn rarely stamped its bore designation code on an individual instrument.
Instead, on instruments built before about 1915, a bore size mark such as
"S", "M", or "L" was often stamped below the serial number on the middle valve
cylinder.

	After about 1927, the bore size could be determined by finding the stamped
model number on a particular instrument, and referring to Conn's brass instrument
model designation chart to find the bore designation code applicable to that model.
Conn brass instrument models which had identical outward appearances were
nevertheless assigned different model designations to differentiate among their
different bore sizes (e.g., Conn 22B, 26B, and 28B trumpets).

C. G. CONN BORE SIZE CHART

         The bore sizes are listed as a whole number, or number and fraction 
        (i.e., 1 1/2). 
        This is a table which translates these to decimal-inch and millimeter 
        dimensions:


                                    C. G. CONN COMPANY  
                              Brass Instrument Bore Size Code


          Code                        Inches                      Millimeters 


          0 1/2                        0.425"                         10.80 mm


          1                            0.438"                         11.13 mm


          1 1/2                        0.458"                         11.64 mm


          2                            0.467"                         11.86 mm


          2 1/2                        0.485"                         12.33 mm


          3                            0.500"                         12.70 mm


          3 1/4                        0.507"                         12.88 mm


          3 3/4                        0.527"                         13.39 mm


          4 1/2                        0.547"                         13.89 mm

         
          5                            0.562"                         14.28 mm


Source: Conn dealer/repair shop,
            
            via Robb Stewart Brass Instruments
            140 E. Santa Clara Street, #18
            Arcadia, California 91006
Note:    First page or pages of cornet list missing
All information is © Copyright 1999, Ralph J. Jones; Tom Meacham
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