McCulloch id help

[Woodslasher]

My brother picked up a McCulloch today but I can't tell what model it is. It looks like a 1-43 but so many freakin macs look like 1-43's that I can't positively ID it. The only number I've found so far is 5449 on the underside if the saw. Yes, 4 digits, not 5. Does anyone have any ideas? P.s. The af cover is missing the sticker, so thats no help.

 

[lostone]

Some Mac's have a label next to the carb. have you pulled the AF cover and looked next to that?

 

[RandyMac]

that has a removable head, 1-43s do not, check the bottom again.
model number is on the left