Girl Guides Sea Rangers promise badge by Collins London

A scarce original pre 1932 pattern 'Girl Guides Sea Ranger promise badge', brass trefoil inlaid with navy blue enamel, bearing fretted star to the top leaf and plain scroll below, the reverse with embossed maker's details 'Collins London' 'Girl Guides' 'Regd No 671782' a registered, design and patent date of 1919. Very good condition, complete with original pin fittings, no damage to the enamel.Height approx 23mm.