@Fatman posted:.. Everyone knows Erector and Meccano , but in the late teens and 20's Frank Hornby in the UK had a bit of competition from W. Butcher and Sons of Blackheath, London who created the Primus Engineering Construction sets , and also made a Gauge 1 clockwork locomotive set !
( again its the HISTORY of stuff like this that gets my juices flowing
)
Those No. 5 & 6 sets must have been impressive if they were too heavy to mail !