LEGO 156 2 Signals with Automatic Stop / Go Attachment is a vintage Trains set from 1968 valued at $53 for new and sealed sets, up 1809% from an original retail price of $2.75. Annual appreciation has averaged 4.75% since release. On the used market, values range from $14 to $17 based on condition.
LEGO 156-1 2 Signals with Automatic Stop / Go Attachment is a Trains 4.5V accessory set released in 1968, containing 6 pieces. The set includes a base plate, two blue signal posts, two blue circuit-breaker bars, a black 4.5V electric on/off switch brick, and connecting wires for use with LEGO train layouts. It was designed to add automatic stop and go signal control to 4.5V train systems through trackside electrical components. The set was also referred to simply as Signals with Automatic Stop / Go Attachment.
A new and sealed 2 Signals with Automatic Stop / Go Attachment is currently valued at around $53, with annual growth of approximately 3%, which is lower than other 4.5V sets. The average used price is $14 for those in good overall condition. Based on current trends, this set could be valued near $55 within the next year.