30-1692 is cab number 692, 30-1693 for cab number 693, or at least it was in the catalog.
as for delivery, if you and I paid our bills like toy train manufacturers adhered to catalog delivery dates you'd be foreclosed, on and walking without your repossessed automobile.
Any manufacturing companies run into delays and other issues MTH just seems to have more than their share. But be patient, if it hasn't been cancelled, it'll get here eventually. Maybe in time for
April, September, October, December, , hopefully no later or I have disappointed grand son at Christmas