Stamp 1:

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

• from the LH recess, left side on stamps 1 (minor) and 30;
  
• from the RH recess, left side on stamps 4, 4, 10, 21, 32 and 38.

The vertical extension of the frame from the recesses at the top is found in two stamps:

• stamp 2
  (left recess, RHS);
• stamp 29
  (right recess, LHS);

The right corner in the top right recess is not strong.

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.

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.