Welcome to this forum, we would love to see images of your safe, sometimes it does give us a view to valuing such a product.
eg: is the safe in original livery? has it been tastefully restored? Does it still have its original keys
These are just a few of many questions that help formulate an appraisal.
Appraisals will vary, as your safe will not have a modern Insurance rating & is not vaible for modern use of storing cash & valuables. The maker bit the bullit many years ago.
Looking forward to seeing your safe
Russell