Yeah, it looked like the bottom of that bottle saw some prolonged moisture at some point in it’s career.
Fortunately (for you), the bottle I received broken looked like it was in pretty pristine condition before the breakage. It was a bit sad to see it smashed as it was. Incredibly the second bottle in the same box was pretty perfect. Which is amazing considering the idiotic way they were both packaged.
I’m happy that the bottom leather will help make another bottle whole again.