Some information from peddler.
I have checked the
Collin's work via Scott 2008

, and I fully agree with
Collin.
By Ma's 2010, corresponding number is 华北#72, C/V CNY15 for mint, CNY 4 for used. In
jimjamtwo's picture, looks the character 南 is also broken at top right corner , if so the stamps is 华北#72a, no corresponding listed in Scott, C/V CNY100 for mint, CNY30 for used.

Hope this help.

ZhangCheng