This tender represents a Locks and Canals Co. tender of 1837, supplied to the Baltimore and Susquehanna railroad. It is generally representative of tenders used in the 1835-1840 period, and appropriate for many locomotives of that era. 

This particular model is intended to fit an ARU Model power truck (ARU Model C4025 ARU power 17A) with a 17mm wheelbase and 9.5mm drive wheels. The bolster of the truck will need to be immobilized before installation into the tender body, a single drop of superglue (cyanoacrylate glue) to the center pivot/screw will do this. Hint: these power trucks are available from online retailers like Plaza Japan for lower prices than can be found on ebay.