Motorola MOC3CNB Monitor receiver IF frequency? Does anybody know??

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Joined Jan 23, 2018
I have this sixties relic receiver that I would like to adapt to monitor our local repeater, 146.640. But as I am the fourth owner, and I got it at an estate sale, it is not clear what the actual frequency it is presently set up for. The original frequency is on the ID tag, but no multiple of the internal crystal frequency leads to a standard IF.
So does anyone have any experience with this model?
An internet search reveals a seller of crystals for the original intended channels, none being useful to me.
Also lots of links to banking institutions, not sure why.