![]() Serial Numberīell Construction – Logo registered TrademarkĪfter some helpful comments from fellow Bach loyalists (David, Tim), wanted to add some examples in this section. This was switched over around 2000/2002 to a computerized laser based system. Similar to the valve serial number engraving, bells today are etched, where earlier Bach trumpets were roll stamped to get the logo applied. Photos of the manufacturing process can be found here.Įarly Bach trumpets used cast braces to attach the bell to the lead pipe, valve block. used a newly developed flower “blank” shape that simplified the forming process and required a completely different approach to shaping the bell flair. ![]() Instead of the traditional funnel shape or fan pattern after 1965 the Selmer Corp. ![]() Selmer around 1973 changed the filler material in the bell crook to a frozen soap type filler from the previously used, confidential alloy of pitch type materials that had been developed through the 1950-1960’s.
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