The 4″ Crosby is a hook and lever steam whistle, #470 pre 1880 whistle (Scholl Engine Shop – Personal Collection).
The 5″ Crosby, #8430, was repaired for a customer by Scholl Engine Shop in 2012.
The 8″ Crosby, #11957, was a full restoration project for a customer by Scholl Engine Shop in 2012.