Model 425S includes the same features as the 430S but offers a range to low Eb.

Specifications
Key:Bb
Bore: 24.00 mm (.945")
Key mechanism: Range to low C
Key style:In-line “Jump” trill keys, plateau style, double register key, fork Ab-Eb key
Body material: Aged grenadilla wood
Pad cup style: Conical
Key finish: Silver-plated
Mouthpiece: 2503-2L
Case: Deluxe wood-shell five-section case