The phrase "about a specimen of" is correct and usable in written English.
It can be used when discussing or describing a particular example or instance of something, often in scientific or academic contexts.
Example: "The research paper provides detailed information about a specimen of the rare species found in the Amazon rainforest."
Alternatives: "regarding a sample of" or "concerning an example of".
The hero of Joel and Ethan Coen's "Barton Fink" (1991), for instance, is, even by the misanthropic standards of the Coens, about as unattractive a specimen of humanity as American movies can provide.
"Spartacus," about the fabled slave revolt, is a specimen of socialist realism, and it shows all the stupidities endemic to that style — notably, overemphasis.
Besides having about 5,000 specimens of some 350 species of fish, the aquarium maintains a collection of more than 200 kinds of reptiles and amphibians, along with 3 species of marine mammals and 60 species of marine invertebrates.
The main zoo has about 2,000 specimens of 500 species, which are grouped according to the continents to which they are native.
The techniques of traditional scanning microscopy and transmission electron microscopy have been applied to immunosorbent electron microscopy, in which the specimen is subject to an antigen-antibody reaction before observation and scanning tunneling microscopy, which provides information about the surface of a specimen by constructing a three-dimensional image.
I wanted to capture a specimen (about three square inches) of paint from the footwell.
Herodotus seems to have known of the abacus as an aid for computation by both Greeks and Egyptians, and about a dozen stone specimens of Greek abaci survive from the 5th and 4th centuries bc.
In Europe, more than half of all specimens characterized so far have been influenza B; the two influenza A subtypes each represent about a quarter of specimens.
Early last year, experts caught a specimen off Fraser Island, about 250 kilometres north of Brisbane, and subsequently issued a warning for anyone looking to take a dip on Queensland's southeastern coast to beware of the toxic jellyfish.
Occupying a 22-hectare (54-acre) site, the zoo maintains about 5,000 specimens of approximately 600 species.
