China 1943 Provincial surcharges martyr 13c. dark green, Commercial Press Printing, Hong Kong, Wmk "Yu", irregular line-perf 12.5, surcharged by Dah Tung Book Co., Chungking.

Chan 692 var/SG 696b var.

There are folded perfs otherwise no thins nor tears.

Please enlarge the supersized scans. 

Thanks for looking.