Pfizer Ord Share Price (0Q1N)

Can anyone tell me if I live in the uk whether to buy Pfizer in London using the ticker OQ1N.L or should I buy in New York using the ticker PFE ? And in either case can I get the reduced withholding tax on my dividends ? Many thanks

This was tipped as a recovery stock , Josh Brown CNBC , star tipster (my opinion) in March, took a few back then also stated pays over 6% dividend, think WHT applies have to check, Sp is moving....slowly

Got some more for $46 although $2 cheaper then last buy but it has cost more with the 1.1631 fx rate .
The 11/8/22 buy at $48 had a 1.222 fx rate.
48 -4% =46.08
1.222 -5% = 1.16

6th of July 2022 was a Wednesday .
Bought more of these last night lifted 6pm for *$48The margin is plus 33k today more then twice as noted on 20/7/22 below .
And a whooping 11 times greater then 15/7/22 .
Margin call was the 5/7/22.Was not able thus far to get any of the other voluntary forced sells back .
Dummy orders today

On the 15th margin was under 3k again five times as low .
Made about 4% with sale and buy back .
Lucky if I can get the other forced sales back , selling just as difficult and Important as buying I have learned .
But I want to say when .