1950's Mobil Decals

Hi There,
I was wondering if anyone can give me any information on these decals. I have two sizes of the pegasus, both left and right facing. It looks like the pegasus' are red. I have quite a few but I don't want to peel one back! I also have a couple of the Mobil decals (as shown in the second picture.) They are water decals, produced by a company named Smith Decalcomania Co. In Southern California. I am just wondering if they are fairly collectible or rare as such. I couldn't really find much online about them. Thank you so much!