Miyazawa serial numbers are typically engraved in discrete locations that may vary depending on the age and model of the flute:
Because the term can denote different constructs in different works, a generic categorization is useful: Miyazawa Serial Numbers
Flutes: Where should I look to find the model number and serial number? Miyazawa serial numbers are typically engraved in discrete
Canonical labeling of rooted labeled trees: Miyazawa Serial Numbers