Following the introduction of the new Palestinian currency (£P1 = 1000 Mils) in November 1927, the postage due stamps had to be changed accordingly: Mil(s) replaced the old Millième(s).
The design of the previous, 1924 issue (Postage Dues II) was adapted.
There were also changes to the placement of the numeral in the central panel and the direction of the Arab script for Palestine was corrected.
Only on the 1m stamp the position of the Hebrew word "Mil" remained unchanged: it still sits above the large cipher.
On all other stamps this term was moved to below that numeral.
The printing sheet consists of two panes of 100 stamps (10x10) divided by an empty gutter. The panes are surrounded by jubilee lines.
Guide marks are positioned in the center above and below each pane.
The numerator is in upper right corner of the sheet with the plate number to its left. An additional plate number is found in the lower left corner.
The 6m stamp diverts from these characteristics in that the gutter shows four pillars, printed in the colour of the stamp.
Accordingly the guide marks are only in the top and bottom margin of the printing sheet.
I have so far not seen any illustration of this.
Another peculiarity is that the 1m value (in colour brown) apparently exists only in sheets of 100 stamps (one pane: 10x10).
The plate number is above field 9, the numerator sits on its right hand. I don't know whether this variant is also known from other shades.
Sheets of the 1m and 4m values printed in 1944/45 are perforated in comb perforation K14.75:14 (instead of K14). They also have just one pane of 100 stamps (10x10).
The numerator is positioned on the top right, but the plate number was moved to the margin's bottom left.