OK John, its getting close to my bedtime -
You guys were close, size was right, post war was pretty much right, just the wrong address.
These are the 32cm incendiary and 28cm HE, Russian rockets. As my escort at the site said to me, you (US) got the scientists, so we took the factory. Kind of strange to see German designs with Cyrillic characters stamped into them. These were in the storage area at one of the most fantastic collections of ordnance I've ever seen, the Russian Artillery Museum at St. Petersburg.
Thousands and thousands and thousands of projectiles, mortars, rockets and fuzes, in a monster building. What is on display is fantastic, what is in storage is even better.
I've attached a couple more pictures of some of the variations of other German rocket designs I saw, enjoy. JO