This cover commemorates the Centenary of the International Salvation Army. It bears the set of two commemorative stamps (SG 242–243) tied with a Kingston postmark, and was obtained from a South African auction site (!!). The cachet is by Wesley Cover Service (WCS), known for producing high-quality Australian philatelic first day covers, so Jamaican covers from WCS are likely to be unusual. This item is unlisted in the Salvation Army First Day Cover catalogue, and I have not encountered another example before — suggesting it may be a very rare cover.