hello wyocat ,i have a book called caterpillar photo gallery by p.a.letourneau thay has some pic in there of 10 ton's ,3 pic have a single ligth ubove rad cap and 1 has a single ligth on the rigth side and one with single on left side ,
all ligths look diff ,but here is one that look factory .bruce oz
Is there any way that you can send me or post the rest of the pictures? Thanks for the info thus far. Have a good one!
hello wyocat ,day off today ,so here are the rest of the pic ,sorry i cannot get them clearer ,bruce oz
The last pic of Bruce's appears to show the acetylene lamps that were initially fitted to the Holt tractors, around WW1.
There are clear pics of these acetylene lamps in the "Caterpillar Military Tractors", Vol 1 & 2 books.