Only Recorded Cover from the Penang Volunteers Force 1915 Envelope from the Kelantan Field Force to Penang franked by 9c for the 3c per 2oz local rate, possibly the sender intended to send the letter registered, transited via Singapore, the only recorded cover from this force (which left in November 1915), sent to put down disturbances which broke out around Pasir Puteh (Image)