The 3133

The 3133 is a self adhesive coil stamp from linerless coils by Stamp Venturers (SVS) and 3M from rolls of 100.

This stamp has a blue 1996 year date and a die cut perforation with two different types of die cut 9.9, side by side on a strip (see below). First day of issue 14 May 1997 (with date 1996!). The only plate number M11111 on every 7th stamp.
M11111

 the 3133
Cursor on picture = blow-up.  
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A couple of types of die cut of 3133 exist: depending on the position of the horizontal cut of the stamps, the die cut starts with a peak or a valley, half a peak or half a valley.
3133
Peak/Peak Valley/Valley
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3133 strip of five
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3133 strip of five
This one starts with a peak at the left top and ends with half a valley at left bottom.
Plate number strip of five with the peak at left top of the stamp.
Plate number on Vallley left top
And here's a plate number on a single with the valley at left top of the stamp.
Pictures thanks to Ken Moreau, Franklin, Mass.
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According to the USPS 5 million Flag Over Porch linerless stamps were printed and issued in coils of 100 with or without a dispenser in a test involving 17 selected Northern Virginia post offices. They were on sale from March 15 to April 30 or until quantities were extinguished. They were also available by mail order through the Philatelic Fulfillment Service Center in Kansas City while supplies lasted. The USPS offered blank backing strips for the collectors to store the stamps.
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