This is 1961-3-1 Malaya British Borneo $10 note with very very rare large B/4 series. This one has two security line one straight thru and the other one is broken dot. LOOK CLOSELY there is an ERROR on printing at the lower left corner which made this a super rare if not unique collector's item. ISC catalogue at RM 4500 for UNC and RM 2200 for EF. I am asking for RM 3200 only