Federal Jet Fire
M= Murray
9 = 1969
5020 = model number update same as Murray Jet Fire, yours looks complete.
X92 = Federal (or the store that sold Federal badged bikes.)
222231 = sequential production number.
yellow westerflyer
Never seen a serial number from Murray start out like that one, but I believe....
W = year code update 1963
55 = model number same as Murray Solar Flite fully equipped missing tank on yours, but the tank mounting tab is still present.
X6 = this is not originally a western flyer. Will have to search my list for whom this is. update - Flying "O" Otasco
458818 = sequential production number.
cosmic flyer
mo = Murray ohio
W = year code update 1963
54 = model number update same as Murray Solar Flite (completely equipped)
X10 = Western Auto stores
510125 = sequential production number.
My computer and internet is down and we be a few more days at least. Don't have access to other info at the moment. Once I get back on line, I will update this posting. Hope I helped, Kenny.