This model was made in the 1970. It would be very hard to give you an original price. They were made in the Czech Republic. One in "Like New" condition today would be worth $65. In the 70's that would be around $30 is my best guess.
The Slavia 622 is a .22 caliber pellet rifle not a .177 caliber rifle. It is a single shot Break barrel rifle. The rifle is a spring piston shooting system. To load and cock the barrel you simply push the barrel down (Break the barrel) all the way until you feel it cock. Load a .22 caliber pellet into the rear of the barrel (Breech) and make sure it's snug flush with the barrel. Load it with the skirt facing out and the dome in the barrel. Then bring the barrel back up into position and let it snap into place. AIM FIRE!
I don't have much information about this rifle but I know that it's made/owned by CZ (Ceska Zbrojovka). I have no information on the model 620 but the models 618 and 622 are worth around $60 in EXCELLENT condition and $20 in fair condition
The factors of 622 are 1, 2, 311, 622
Divide by 622.
622
In excellent working condition it would be worth between $75-$95. Like New it is worth around $110. W/O scope.
The original mosque was built by Muhammad next to the house where he settled after his journey to Medina in 622 AD.
equivalent fractions of 622 = 622/1, 1244/2, 1866/3, ...
1285 + 622 = 1907
1, 2, 311, 622
622 = seiscientos veintidos
622 / 2 = 311