KGV Admiral How Do You Tell The Diff Between Booklet Stamps And Those That Fall Under Type C Or D

See photo attached.....how do you tell the difference between booklet stamps from the KGV Admiral issue and those that come from the edge of the sheet, either top/right, bottom/right , right, top or bottom....obviously this only applies up to 3c Carmine as 5c and above dud not have booklets made.

Sorry wrong photo...correct one below

refer to article from BNAPS

https://bnaps.org/ore/VanSomeren-Ad...ightEdge.htm

I use the straightness of the edges determine. When the sheet is cut into 2 or 4 panes the edge is usually rough. When the cutting the booklet pane the edge us usually straight. This is a generalization and not perfect. There is some booklet panes that show a rough cut on one side where the sheet was cut into the panes but straight on the rest where the booklet pane was cut. (as shown in the image below)

Thanks for response...the only one !!.....link to article was very interesting and helpful.

Robert

The rough cuts come from center rotary perforator cutting wheels that were used to divide stamp sheets into stamp panes at the same time that the stamp sheets were also being perforated. These are mostly found on sheet stamps and on some booklet stamps.

The smooth cuts come from straight edge cutting stroke guillotines which were used to further divide stamp panes after perforating. These are mostly found on coil and booklet stamps.