The Hyogo obliterator was a 3 bar horizontal oval.
The illustrated stamps have a 4 bar vertical oval D30 which was used in London for bulky and printed matter, (according to Parmenter).
Mike Batty

Chris
1) Do you know the location of the British Post Office Constantinople, opened in 1857?
2) The British Army Post Office opened in January 1855. Where was it located?