WW1 National Reserve Class II St Pancras London home front badge

A rare original First World War period large gilt badge inlaid with blue and white enamel, '22' impressed to the right side rifle butt, the reverse with maker's details 'J.R. Gaunt London' and impressed '7781 St Pancras'. Very good condition, complete with original buttonhole fitting, no damage to the enamel, (minor manufacturing infill bubble flaws only) gilt finish remains bright. Height 37mm.