The strangest thing about these nails is the fact that totally different companies used a copper Hubbard nail, then went  to a flat indent nail....and then back to a Hubbard nail, and each year the nails are very similiar. Though there are no known GE1931 or LB1930 being pulled.......I like to believe they are out there waiting to be pulled.  I recall seeing a HW1929 Hubbard nail in a nailers collection, but cannot remember who's collection.

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Large Girard Hubbard by Lee Brewer

In the town of Girard, PA, my friend Dave Heise and I were once walking
while looking for insulators.  I walked by a telephone pole and a Girard
nail was just about falling out of the side of it (1998 or 1999).  I reached
for it and it about fell into my hands.  I wondered what someone had pounded
a large headed nail into the pole for - I was thinking to hang a garage sale
sign up or something like this.  I then saw what it said.  This was the
first I had ever noticed a Hubbard nail of any sort.  We kept walking and
found another.  We decided, after getting back to the car, to cruise the
small town and see how many more we could find.  After cruising the whole
town (a couple of times - slowly - its a small town!), we found a total of
4.  I went back there a few more times to see if we had missed any of them
and have never uncovered another.  I have even looked to try to find where
they might have taken all of the old poles (a lot were replaced and I
suspected this is why we found no more of the nails) and discarded them, but
I was unable to locate them.  I have yet to understand why a small town like
Girard would want to have Hubbard make a die for them since it has
always been such a small town.  This is probably one of the unsolvable mysteries we
will never know the answer to!