With filigree brass mast, authentic varnishing and underfloor drive unit. Disk is movable and lighted. With one LED, maintenace free. Different kind of block signals are possible. As a block signal item-No. 4517 is a version with flange socket which is single standing by the track, the block signal item-No. 4515 is a lower standard version. It is used e. g. directly in front of a home signal. Signal pictures Sh0 and Sh1. Height: 65 mm.