For your consideration, I have a Vintage Metal Record Storage Box Case 78 rpm - Nice!  This is 10-3/4" x 10-7/8" x 6-1/4" deep.  This will hold around 50 records.  This is in nice condition with no rust.  The inside bottom is lined in felt.  This comes from a smoke free home.  I will be listing several vintage items so check out my other listings as I will combine shipping on multiple sales.