The meter mark of the Salvation army international HQ seems to have been used as an addon on quite a few Christmas FDCs. The local post office next to the HQ is London E.C. which is the PM used on the meter mark. During the 80ties, the SA issued some special “Carols at Christmas” covers, but in the 90ties, the practice discontinued and the use of slogan PMs seems to have substituted it. A few such Christmas FDCs are shown here.