Is this a real TDA1541A?

Is this a real TDA1541A S1 2 double crown

Need your help to identify is this original Philips Holland? This is second hand price is 350 USD is it worth?
 

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S1 double crowns are S1 single crowns which have been re-tested at a later date and found to meet the S2 double crown specification. This explains why the second crown printing doesn't match the first one - the second crown was printed on a different machine.

A lot of people reckon that the Holland S1 double crowns are the finest variant of the TDA1541, although I prefer the 1997 batch of Taiwan S2 double crowns.

My hunch is that these are genuine - but there are a lot of skilled fakers out there who know the high value of these IC's so buyer definitely beware. Even if they are genuine though, $350 seems over the odds to me. However, like everything else, they're worth what someone is prepared to pay for them.
 
sure is fake S1= 1 crown
S2= 2 crowns

Just read the datasheet!
TDA1541A/N2/S1 bit 1-7 EdL < 0.5 LSB
bit 8-15 EdL < 1 LSB
bit 16 EdL< 0.75 LSB
The S1 version has been specially selected to achieve extremely good performance even for small signals.


■Marked with single crown (TDA1541A/S1 only)
■Marked with double crown (TDA1541A/S2 only)


From Philips digital paper.
www.nxp.com/acrobat_download2/various/DIGITAL.pdf
 
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