- Ammunition box.
- Empty belts box.
Made out of 1 mm aluminium sheet exept for the bottom in plywood, it is covered in fabric coted with brown pigmented non shrinking dope, filled with vegetable fiber. An aluminium corner prevents the cushion from sliding.
Of note, how the fabric is laced to the seat, which is quite different from the "usual" way found in modern drawings or representations, the seat belt whose lower fixing differs also from common representation and the height adjustment turbuckle.
The seat is fixed to its mount by rivets: 6 in the back and 1 on each side.