20 kopeks 1951 , pattern or not?

Hey guys
How can you distinguish the pattern from the normal one?
Thank you!

Link please, I'm too lazy to look it up.....

Verweis : "Sjoelund"​Link please, I'm too lazy to look it up.....

​Metal content, but weights are virtually identical and because we don't know the % of the metals in each type, I'm not sure how they can be easily distinguished.
https://en.numista.com/catalogue/pieces5348.html
https://en.numista.com/catalogue/pieces94083.html

Maybe magnetic or not?

Verweis : "kommodore"​Maybe magnetic or not?

​There are many similar alloys that are called nickel silver. They are an alloy of copper, nickel and zinc. The most widely used is 62% Cu, 18% Ni, 20% Zn. Nickel silvers are non-magnetic just like copper nickel (70% Cu, 30% Ni).

You'll have to find another 1951 but the "trial strike" has a design that is a bit further away from the rim.
You would need at least 56 percent nickel content before Cu-Ni alloy shows any ferromagnetic properties at ordinary temperatures.

Here s mine. Notice the strange silver look

Verweis : "Idolenz"​You'll have to find another 1951 but the "trial strike" has a design that is a bit further away from the rim.
​You would need at least 56 percent nickel content before Cu-Ni alloy shows any ferromagnetic properties at ordinary temperatures.

​The border on the pattern coin is NOT rounded and the distances as said by Igolenz

There's some on ebay: https://www.ebay.com/itm/154293611830?hash=item23ec9dad36:g:8IAAAOSwrhFgAfpX.

Looks like thats how they normally look, The CCCP is a bit lower on 1951