Translation of "Specimen" in Japanese

This is a very rare specimen.

これは極めて珍しい。

A good specimen might weigh up to a kilo.

いいものになると１キロにもなるものがありますよ。

- This is a very rare specimen.
- That one is very rare.

これは大変珍しい物だ。

The end of which there were two little sketches of rhetoric and logic, the latter finishing with a specimen of a dispute in the Socratic method.

その巻末には修辞学と論理学の技法についての２編の短い大要があり、後者はソクラテス式論争方の見本で結ばれていた。