Vintage Benjamin Franklin pump pistol

Hi everyone,
I recently came across a vintage Benjamin Franklin pump air pistol. I’m wondering what year this was made.

Also, how does this exactly operate. Does it need to be cocked while pumping? Or uncocked while pumping. And how many pumps is recommended for a shot?

Thank you.
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Hi everyone,
I recently came across a vintage Benjamin Franklin pump air pistol. I’m wondering what year this was made.

Also, how does this exactly operate. Does it need to be cocked while pumping? Or uncocked while pumping. And how many pumps is recommended for a shot?

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I came so close to buying one yesterday ....... so close ,but the guy knew nothing about the gun , just a reseller .