Wheels of Time have announced HO and N scale versions of the Allis-Chalmers HD-21 crawler and bulldozer. Designed to compete with he Cat D-8, the HD-21 was built from 1954 – 1969 and was used a wide variety of industries.  They will be available in undecorated and finished editions…  

 

More information can be found on the Wheels of Time website HERE.