Looks to be iron with round brass front. Great patina as seen in pictures. May have been lightly coated in the past. See pictures.
4 1/2" tall when closed and 2 1/2" wide. Chain is 7 1/4" long.
IF ANYONE KNOWS THE SPECIFIC INFO ON THIS AND WOULD LIKE TO SHARE PLEASE DO. This may be worth more than I am asking!
Let me know if you have questions.