Double High E & F Keys
This adds a high F key for the forefinger to the double high E key.
Catalog Number: 26
Available On: 601, 660, 101, 201, I, II, III, & IV
Conflicts With: Offset High E Key (4); Offset High E & F Keys (17)
Required Deletion: Models 601, 660, 101, 201, I, II: Delete Standard High E Key (3)