Still looking for help on the 22-36

2. center tank cap coler and what was it used for

3 tank closesed to the engine cap coler and what was it used for need this info for the show, i was told one was used for water, fule and gas, thank you ps in topeka kansas this winter i was told that the 22-36 that went across seas had 22-36 on the back of the fenders was this right , and the usa was 15-30 on the back fender, just need more info,

The 22-36 that I bought in March has, what most people around here believe, the original paint on it even though it's faded and chipped as you can see in the picture. Near as I can tell the fuel caps are the grey color. About the decals I wouldn't know but I bought this one in central Minnesota so I can't really see it taking a two trips overseas but anything's possible...if you need any other help let me know I can always go out and take a look...