Page 14-D-4 of the June 1945 AAF Manual 55-0-1 shows all the components of the C-1 emergency sustenance vest. In the upper left corner of that photo, can be seen Marlin razor blades. This photo shows 21 but only have 19. Thanks so much for looking and please check out my store. You will find many unique and rare vintage items. I do not combine shipping on items that are " on sale". Due to paypal rules and fees and the USPS constant increases in prices, I can not combine shipping on items that are "on sale". REMOVES THAT OPTION FOR ME WHEN ITEMS ARE PUT ON SALE. If I charge $10 for shipping, and paypal take just over $1.50 in fees leaving $8.50 to pay for box, packing and post office charges. If you live in Texas it is usually a break even price for me. If you live in NY or CA I usually lose a little on shipping. If I refund any shipping via paypal, it will not be much as I cannot get the fees (that I paid on the refunded amount) refunded from. I am sorry for this but it is out of my control..