Compare to:
TR11: Schilke 11
TR11A4: Bach 7E
TR11B4: Bach 7D
TR11C4: Bach 7C, Giardinelli 7C
TR13A4a: Schilke 13A4a
TR13B4: Bach 6C
TR13C4: Bach 6B
TR13D4: Bach 6
TR14A4a: Schilke 14A4a, Giardinelli 6S
TR14B4: Bach 3C, Schilke 15B
TR14C4: Giardinelli 5C
TR14D4: Bach 5B
TR14E4: Bach 3C rim, very deep cup
TR15B4: Bach 2C, shallower cup
TR15C4: Bach 2C
TR15E4: Bach 2C rim, very deep cup
TR16C4: Bach 1-1/2C
TR16D: Bach 1-1/2C, deeper cup
TR16E4: Bach 1-1/2C rim, very deep cup
TR17B4: Bach 1-1/4C
TR17C4: Bach 1C
TR17D4: Bach 1C, deeper cup
TR18C4: Bach 1
TR5A4: Bob Reeves OES 69
TR6A4a: Schilke 6A4a
TR7A4: Purviance 4 (4*D4)
TR7B4: Schilke 7B4
TR8C4: Bach 10-1/2C, Giardinelli 10C
TR9C4: Bach 7C with smaller rim diameter