Maker not known its very old with unique key and in full working condition
7 inch length,6 inch height,2.4 inch thickness
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Based on the images and information you provided, this item is:
A 1870s Iron Screw System, handcrafted Pad Lock. In the 19th century, iron screw systems and handcrafted padlocks were important components of security and fastening technology.
The 1870s marked a period of significant advancements in industrial technology, including the use of iron in various applications. The iron screw system likely refers to the use of screws and bolts made of iron for a wide range of purposes. Iron screws were used in construction, machinery, and various other industries.
One notable development in iron screw technology during this period was the introduction of standardized screw threads. Before this standardization, screws and bolts were often inconsistent in size and threading, making it challenging to interchange them. The standardization of screw threads allowed for greater compatibility and ease of use in construction and manufacturing.