At 03:38 09 June 2011, T wrote:
Older glider certificates were issued with "aero tow only" or
"ground/
winch launch only" restrictions. Those were removed in the 90s and the
certificate simply says "glider.

My original license was issued in 1970, it simply says "glider". The
aero tow and ground launch restrictions on the license came much later,
mid-80s I believe. Since I did do some auto tows back then, I was
grandfathered for ground launch, but I considered it very worthwhile to
get training and an endorsement for winch launch 6 or 7 years ago...

Marc