"L" is machine dependent. To resolve that ambiguity, switch to "L<" or "V". 
$ perl -le'print unpack "L<", pack "H*", "B65B7B4000"'
1081826230

$ perl -le'print unpack "V", pack "H*", "B65B7B4000"'
1081826230

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In reply to Re^2: [pack]little endian timestamp to decimal value by ikegami
in thread [pack]little endian timestamp to decimal value by timtowtdi

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