An old Fuji/PFM Southern Pacific E-23 American that I found on auction with no tender and a pilot beam and front coupler that had been glued back on with silicone rubber! (Ahem!) The feedwater pipes running back past the firebox were also broken free of their solder joints, the bell was gone, and the pilot-truck tension spring had gone missing at some point.
The good news was that the loco had *zero* running time and was from the later run that featured brake shoes, which I'm told the early ones lacked. It was also cheap.
I soldered the pilot and pipes back together, wound a new pilot-truck spring, modernised her a bit with an S.P. style Pyle headlight, added a spare small whale-backed tender, and painted and decaled them both for the Sud Pacifico de Mexico where small old-fashioned steam engines such as this one held out until the mid 1950s. (Oh yeah, I also poured two plus ounces of lead into the cab's roof, thereby balancing her better on the drivers while adding tractive effort as well. She'll now pull circa 8-9 average 40' cars up our 2 1/2% grades, which is all one could ask of a tiny 4-4-0.)
~Pete