Recommendations on Survey Meter Recalibration?

Recommendations on Survey Meter Recalibration?

I have a Civil Defense V-715 radiation survey meter rather like this:



that was a gift from a friend some years ago who is among the only people substantially more technonerdy than myself. I'm thinking of having it recertified, since it is probably not accurate. (Who knows how many decades since anyone used it for its intended purpose?) And yes, this is a vote of no confidence in President Zero's ability to keep North Korea only blowing up nukes in North Korea, and to keep Iran from selling nukes to al-Qaeada.

There are at least two businesses that do recertification of survey meters: Two Tigers ($80); and RadMeters4U ($78). Any recommendations from my readers as to who to have do recertification?

UPDATE: Correction: I finally found it in the garage. It is actually a Jordan Electronics CD V-710 Model 2, like this:



and only just a little more dusty.