The upper left appears to show remnants of two or three perfs.
Perf12 provided a link to an article about this issue. The article references the American Philatelist which published a two-part article in March 1939 and April 1939. Here is an excerpt from the April issue:
(Type V is the same as the Type E mentioned in perf12's article).
The APS article also notes that it is believed that only 5,000-7,000 imperforate 30-haleru stamps were originally produced.
And no doubt there is a lot of new research that has occurred in the last 80 years.
I would probably get this stamp expertized.