The collection of mechanical engineering items, catalog no. T:23, includes 122 individual exhibits from the following fields: turbine mechanics, speed measurement, distance measurement, temperature measurement, measuring tools, instruments for technical drawing and writing, mechanical assemblies and elements etc.
Among them are handwritten pencil notes, printed business cards with and without annotations, cancelled postage stamps, accounts on the cheapest paper, checks and printed forms with handwritten contents, and typewritten texts with duplicates, as well as diplomas written in colored ink on parchment, a charter with an intaglio stamp, india ink drawings on tracing paper, blueprint copies of plans and many other items.
Given the age and variety of this material, it may be said that most of it is relatively well preserved. The entire archive is kept in 548 boxes (which are the basic units for processing and storage of the material) and catalogued in seven units according to the subject matter of the documents.