That's a Wilson Bohannan Wilson Bohannan Padocks - Lever - #100 thru #877 - Antique Padlocks
Very nice old padlock for sure! You can tell that a skeleton key had been used to unlock it so you know it's old. You're also lucky that it has the nice letters on it that should help you to further identify it and it's actual age as well. Are there any other markings on it anywhere?
Thanks [emoji1303][emoji359]