Early collection of industrial style_Old brass abacus can be used as a paperweight

Early collection of industrial style_old brass abacus, which can be used as a paperweight and can be used for actual calculations Appearance size: The size indicated by the ruler, it is quite heavy to hold in the hand. Craftsmanship: Old Bronze castings in the early days, brand new products, put them into natural oxidation. Bronze castings inevitably have sand holes, pits, patina, surface oxidation, etc. Old things will inevitably have scratches... and other marks, the above can be accepted before subscripting, or ask questions first. Thanks