i found a OEM stihl coil that has the last 4 digits as the one i need, but no hint as to what its for. its looks exactly like the one i have so i took a chance and bought it. $17 instead of $100 from a dealer. we'll see, hope it has the same timing paramerters as the old one. it may be for a blower.
the number on the box is 4203 400 1302. in the ad they used 1301.