Due to its size it will be an O Gauge item. It is made from wood except for its signal arm that is made from tinplate. Here we have for sale a collectable O Gauge Single Arm Signal that is made from wood, it is not boxed.
Hornby Meccano Single Arm Signal Vintage O Gauge No.2 A257
GMC-100.O Gaugemaster O Gauge Single Track Panel Mounted Controller for O Scale
O gauge (7 mm) B 70-01E O gauge single track engine shed extension
Hornby O Gauge Single Arm Signal - Mettoy?
CH322: Hornby Trains O Gauge Single & Double Arm Signals x 4
Hornby Series O Gauge Single Arm Lattice Post Signal - Spares/Repairs