norton engine identification

please help to identify these single engines 1( number 52111(h4 underneath) 79x100 and2( 96591 (13 underneath) 71x88 years would be appreciated as well.please email lms2000uk@yahoo.co.uk kind regards and god bless,ian.

ianhornby said:

number 52111(h4 underneath) 79x100

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http://www.bmh.com.au/norton/index.php?id=modelnum

(52111) H = 1953
4 = ES2
79 x 100 = 500cc

ianhornby said:

96591 (13 underneath) 71x88

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96591 = 1961 (or 1960 depending on the source of the information).

13 = Model 50
71 x 88 = 350cc.

thanks lab,have a nice weekend