Hi Pete, Just briefly, the 4.(H)/21 was a short-range reconnaissance squadron. Within the Luftwaffe reconnaissance organisation, short-range reconnaissance Staffeln were originally given the (H) designation which, as they worked in close co-operation with Armies and army groups, identified them as Aufkl?rungsstaffeln (Heer) or reconnaissance squadrons (attached to the army). Thus, the 4.(H)/21 was the fourth squadron of short-range reconnaissance group 21. As far as the pin goes it could relate to either the 4.(H)/21 or one of the Staffeln of KG 55. IMHO the style of the Griffon looks more akin to KG 55 than the 4.(H)/21 HTH Dave