One Roller Low E Key

A pancake key with a single roller. The roller may be on either the B(flat) side or the F(sharp) side. The adjacent key should also include a roller.
Catalog Number: 71
Available On: 601, 660, 201, II, III, & IV
Required Addition: Thumb B(flat) Roller (69); Thumb F(sharp) Roller (75)

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