Haraszthy Cellars California Golden Sherry Bottle

Here is what I know: My grandparents drove all around in the 50-60's to find these bottles (I was told there was 12 I think that they found all together) This one they bought for $120 (emptied already) Eventually they sold 11 of them and bought their house with the money they had made, this one was supposed to have been worth the most so they wanted it passed down to continue to grow in value. I was told that there were only 1000 of these bottles made and then the molds were broken. I have contacted the Haraszthy Cellars who thought it was a wonderful piece of history but had no clue anything about it or what it would be worth since the winery had changed owners, in 1968 Vernon Underwood of Young's Market bought it, and before that in 1941 Frank Bartholomew purchased it. But since the bottle has no date I can not say who might have been there when they were made. The bottle has no cracks or broken pieces, it does still have the original label and cork. It also has no date, or number or anything else. The bottle itself is 14" tall.. Thank you in advance!

Haraszthy Cellars https://imgur.com/gallery/Eul2F