ABN 31:
Maple wood.
simplified and adjusted keywork
19 keys
high C key
covered wing joint 3rd finger hole
Eb vent key
piano lock key
2 rollers
1 bocal
rubber tubes extending into the bore
balance holder
silver-plated keywork matt lacquered wood.
ABN33
as above plus:
covered wing joint 2nd/3rd finger hole and boot joint 1st hole