The extension of the frame from the recesses at the top is found on:

• stamps 30 and 36:
  from the LH recess, left corner;
  
• stamps 1 (minor), 4, 5, 10, 21, 32 and 38
  from the RH recess, left corner;
• stamp 42:
  horizontal LH recess, left corner.

Blunt corners on the recesses are found on:

• stamp 36
  right recess, left corner;
• stamps 23, 36 and 41
  right recess, left corner;
• stamp 5
  right recess, right corner.

The extension of the frame from the recesses at the top is found on:

• stamps 30 and 36:
  from the LH recess, left corner;
  
• stamps 1 (minor), 4, 5, 10, 21, 32 and 38
  from the RH recess, left corner;
• stamp 42:
  horizontal LH recess, left corner.