They were produced from 1955 to 1977.
This rifle is better known as a CZ model 618. They were manufactured in the Check Republic in the 1970's
The Slavia better known as a CZ (Ceska Zbrojovka) it was made in the 1970's. You did not state the condition of the rifle so I can't give you an estimate of value.
very little is written about this manufacture. All I can tell you is it started in 2005
The Slavia 618 is a vintage air rifle that was produced primarily in the mid-20th century, around the 1960s to 1970s. The specific age of the model with serial number SNR53657E would depend on its production date, which can vary. In terms of value, it typically ranges from $100 to $300, depending on its condition and any included accessories. For an accurate appraisal, consulting a firearms expert or collector would be advisable.
Slavia Sofia and Bulgaria U21 are the tenants of Slavia Stadium.
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
Slavia Melbourne was created in 1951.
Slavia Melbourne ended in 1983.
It was made in the 1970's You did not state the condition of the rifle so no estimate of value can be given. Average value $25
All I can tell you is it was made sometime in the 1970's in the Czech Republic. you will need to give more information about the condition of the rifle to get an estimate of value.
sometime around 1970
RC Slavia Prague was created in 1927.