From a dump that went from the 1940's to the 1840's.
No way to repair I'm afraid, unless there is some new process to remedy the problem.
I think it was a miracle that this came out of the hole intact.
Cute amber flask! For damage like that I like to simply drip some krazy glue into the cracks. This doesn't make it look better, it simply makes it less likely to fall to pieces if you put it on display, nothing worse then broken glass everywhere. At least one side looks nice so it can display good!