HO 87:1 scale Dwarf B&O CPL with speed indicator lamps, two pieces, front and back, are attached by sprues to make a quantity of 1 signal. If certain lamps or details aren't desired, they cut be cut of prior to painting. At the cut, you might have to putty and sand to get a smooth surface. This model is slightly larger than the prototypical design. The model head design is 19.2" HO scale, while the prototypical design is actually 15 1/2". The reason for this discrepancy is due to the thickness of the lamp hood which by Shapeway's guidelines must be 0.3mm minimum thickness. If someone was willing to make .007" thick brass tube hoods, I could make this design closer to the prototypical design.
The model is designed to use 0402 SMD LED's.These LED's are available pre-wired on eBay or you can use Evan Designs pico chip LED's available @
There is a 0.5mm x 3.0mm slot for wire routing through the base of the signal. The size of these LED's (1mm x 0.5mm x 0.7mm tall) and this model (signal head ~1/2"in diameter) are very, very tiny and assembly is going to be tedious and possibly difficult. Therefore this model is not recommended for novice modelers. Two 3 lamp speed indicators are attached to the main head. To obtain a single or double speed indicator configuration cut off the un-needed lamps from the indicator bar.