The type 9 duplex obliterator comprises 3 distinct types:
- 9a - QL duplex obliterator type 9 with time in the centre top line
- 9b - QL duplex obliterator type 9 with PXB in the centre top line
- 9c - QL duplex obliterator type 9 with POB in the centre top line
Type 9b PXB 'QL' (No stops), in thin letters 3 mm high within an oval of 27 unbroken broken rays. The datestamp is 25 mm in diameter with 'BRISBANE' around the top, 'QUEENSLAND' around the foot, and a dot stop at each side; in the centre, in three lines, are 'PXB' the month and day, and year in two digits.
It is not known why 'PXB' was inserted in some of the type 9 duplexes or what it signified. It is possible that it is similar to the usage found in the type 14 Pillarbox octagonal date stamps, where PXB means posted interstate box; however examples have been seen sent within Brisbane, Queensland, interstate and overseas. Wytenburg suggests that this duplex may have replaced the pillarbox date stamp but these continued to be used until 1910.
Known used from 5 July 1906 to 21 September 1908 plus an outlier dated 22 December 1910. Rated 2R on stamp and 3R on cover
1906
Type 9b PXB QL duplex obliterator rated 3R. Dated 22 July 1906
Type 9b PXB QL duplex obliterator rated 3R. Dated 27 August 1906. Seen in Marius Wytenburg' s Brisbane exhibition
Type 9b PXB QL duplex obliterator rated 3R. Dated 1906. Seen in Marius Wytenburg' s Brisbane exhibition
1907
1908
Type 9b PXB QL duplex obliterator rated 2R. Dated 1 January, 6 January, 20 January, 1 July, 20 February and 20 October 1908
1910
Date unknown or indistinct
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