This is one of my current projects. It is a 1:32 scale, 32mm gauge (what I call 32/32) representation of the Arcata & Mad River RR #5 Baldwin 2-4-0. According to Carranco and Sorenson's Steam in the Redwoods, this locomotive was built in 1888 and scrapped in 1941. The forerunner of the A#M is reputed to be the first railroad chartered in California. Even today the line, though abandoned, is affectionately referred to as the "Annie & Mary", after the two woman who ran the office in the early days.
The design is mostly my own, although I borrowed the cylinder and valve train geometry from LBSC's WWII era "Bat" design.
When I got my new milling machine last month I paused work on this to start on Elmer Verburg's "Grasshopper Beam Engine", mostly because I wanted an excuse to mill a bunch of stuff.