Quick-Action Compass Series Blue Master,
economy-priced, but technically good construction,
pressure lever mechanism with automatic spindle and centre wheel,
2 knee joints,
by attaching adaptor with 4 mm dia. spigot all commercial technical pens can be used,
compass length 175 mm, working range up to 370 mm Ø, with extension bar 610 mm Ø,
mat nickel plated,
lead box,
in transparent covered box,
material zink diecasting