Only reason I bought mine in the first place was my Sun 6 volt
model X
http://www.pbase.com/dennygraham/image/161459570 and Sears Roger Penske timing light, which itself was
probably forty years old, crapped out on me and I figured
it's only a few bucks more to get one that would keep up
with technology and last me my remaining 27 years.
dg