Brno Model 5s. Two from 1958 and two from 1966.

Scopes are older model Swarovski and Schmidt & Bender.

Peep sight is Parker-Hale (England.) Clamps to dovetail. No drilling.
It swings to the side for bolt removal and scope mounting.

CZ factory scope mounts. Walnut stocks.

In the first picture, the two that are in front are the later ones from 1966. They have a straighter, wider and thicker buttplate. The earlier pair from 1958 have the curved tapered buttplates and polished receivers. The later pair have a matte finish on their receivers, with only the barrels polished. The Parker-Hale peep sight is marked "Parker-Hale Made in England PH16N." It appeared in the old Parker-Hale catalogues. One of their "Sportarget" series, this model PH16N was specifically intended for Brno .22 rifles.