[Heathkit] Help with a SM-4130 manual

[Dennis Berry]

I recently picked up an older Heath Schlumberger SM-4130 frequency counter that appears to be working, at least at first glance.  I've done some searching on the web for this unit, very little, if anything shows up.

Anyone know where I might pick up a manual for this item?  As I recall, units with the Heath Schlumberger name were not kits, but purchased as final units?  Any info would be interesting to learn about it.

Thanks in advance, and I hope this is not off topic.

Dennis, NU8S