1895 Cased Victorian Mechanical Recording Ammeter Seth Thomas Clockwork Mvmt

Here is recent Estate find. This is a Rare Early Antique 1895 “Bristol’s Recording Ampere Meter” Cased Victorian Mechanical Recording Ammeter, with Seth Thomas Brass Mechanical Clockwork Wind-Up Movement with Lever Escapement, Made by The Bristol Company Waterbury Conn. This Has a Key Wind Movement and includes a Winding Key. I wound it up and it is Ticking and Appears to Be Working Correctly. This is in Good Original Condition, But I think there is supposed to be a Backing Plate Behind the Paper Disks? What You See Pictured is What is Included.