This engine may be the very last engine converted from Walcharts valve gear to Baker. Where the old system had lots of moving parts worn out by friction the new Baker valve system dose the same job with pin joints and ball bearings. The Baker Boys Machine Shop did most of the lath and mill work on this engine. The movement is a simple 4 to 1 that opens and closes steam and exhaust ports. This engine is one of the favorite engines in regular service at Tiny Town every weekend. A real coal burner that is a thrill to see and smell.