Hercules Motorcycles

Hercules 1955 Model 322 250cc Twin

I'm from Czech Republic Brno. Please give on the motorcycle Hercules 250/322 manufacturing year 1955. I am interested in the number of units that produced 322. The rear fender is made to mark the anniversary of 50 brands of Hercules. The bike is an original in its original state. What is the value of the machine?
Thank you very much for your information.

Sincerely Pešek Vladimír Brno Czech Republic.

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