United States 1/2 dollar 1971 missing in catalog

could see the below link for the coin until 1970 as mint year.
I have a coin from 1971. can you check?
Anwar

Citação: anwarsukcould see the below link for the coin until 1970 as mint year.
I have a coin from 1971. can you check?
Anwar

 What below link - there was no link on your message?

I found this (1971 - 2013 Copper-nickel clad Copper) coin ...
https://en.numista.com/catalogue/pieces6918.html

Maybe you referred to the silver coin KM# 202a 1965-1970 with same design ...
https://en.numista.com/catalogue/pieces10865.html

So if you found until 1970 coin then go to the Country list and select United States (this is how I found the coins above) and on the   Keywords: country:"United States"   box press the space bar (to separate from the previous words) and type 1971 and click on Search. There are 7 coins found ...
https://en.numista.com/catalogue/index.php?r=country%3A%22United+States%22+1971&c=&cc=y&cn=y&cj=y&ce=y&cu=y&cat=y&mode=simplifie&p=1&e=&d=&km=&i=&v=&m=&a=&t=&dg=&w=&g=
 So the box shows  Keywords: country:"United States" 1971
 

The 1970  US 50 cent coin was only in mint sets

sorry 1970 D were in mint set silver not sure if 40% or 90%.
 and 1970S poof silver. those are the only 50 cent coin made in the US in 1970

1965 till 1970 all Half Dollars are struck with 40% silver as far as I know. 1964 is the Only year that US Mint produced 90% silver Kennedy half dollars.