A very fine and highly unusual set of four liquid measures from pre-revolutionary Russia, made of ferrous metal with brass collars and identification plates.
All four mugs bear a brass plate which is stamped with the name Nikolayev (Николаевъ) and the town of Kazan (Казанъ). Whether he is the maker of the measures, or the owner of a shop where they were used I do not know.
The largest is a "half-bottle" (полбутылки), or 1/40th of a bucket and stands 100mm high, next is 1/100th of a bucket (78mm high) and the two smallest measure 1/200th of a bucket, one stamped "for oil" (для масла), and these are 58mm high.
All four cups have verification marks stamped into their brass collars. The oil measure has three such stamps, the others only two.
These are in remarkably good condition given their age, and the fact that four have survived together over this time makes this a unique addition to any collection of metalware or measures.
I bought these in the Izmailovsky flea market in the late 1990s when I was working in Moscow.