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The ever-changing world of technology inevitably results in obsolescence of some once prevalent items. A 1610 kHz crystal can be had from some obscure source, if you are lucky enough to find it. Or, maybe you can order a hundred or so specially made from some manufacturer. Today’s reality is that 1610 from a crystal is had by PLL or direct frequency synthesis.
I know this doesn’t answer your specific question. Just a comment.