Whilst the wings part and the wreath certainly look like they are from a BSAP Reserve Air Wing Pilots wing it is not a BSAP issue item. Probably made up to catch people unaware or maybe a one off by a unit member though I can't think what the S might stand for as the only 'ranks' or 'appointments' in that unit were Police Reserve Pilot and Police Reserve Observer.
The Unit continued under the Zimbabwe Republic Police but I don't think they diverted from the usual wings apart from a change of badge in the centre and they were not very active
Wayne
