cover 1942 (18 Aug.) envelope from Singapore to Kuala Lumpur bearing "DAI NIPPON" overprint on Negri Sembilan 1c. vertical pair tied by bi-lingual c.d.s., showing triangular-framed "T" and, on reverse, bearing 12c. ultramarine handstamped in red and tied by Kuala Lumpur double-ring d.s., fine. Rare. Photo