• Era: This instrument was likely produced during the later years of the Los Angeles era, prior to John Duda purchasing the company and moving production to Tulsa in 2004.
• Location: Serial numbers in this era were typically stamped on the side of the second valve casing.
• Context: Calicchio instruments from this period are highly regarded, known for their specific bell tapers and, in many cases, lightweight design.

Calicchio historically manufactured its own valve blocks in-house. For a flugelhorn with a serial number in the 35000 range (dating to the late 1990s), the valves were produced by the Calicchio workshop in Hollywood, California.

These valves are very smooth and hold excellent compression.