The Body Information Tag indicates it was the 153rd body to come down the body and trim lines; As almost all of the finished Virginian bodies sat in the Body Bank weeks (or sometimes, months) before final assembly you can't identify the month the car was built and ok'd by Final Assembly Instpection. If you get the door post serial number, please post it and I'll see what I can come up with.
Otherwise, here's the info off the headers on the firewall tag:
Model K4923 1949 Kaiser Virginian 4-door hardtop. External Color is Horizon Blue Lacquer with a Black Nylon Top, with Havana Blue Stockholm and Beaumont Cloth. Interior photo of rear seat area shows the push button that operated the vaccuum powered window lifts rather than crank type window controls. Vaccuum unit is a system supplied by Trico. (060 and 2318 off the body tag).
The Virginian presented here should be equipped with overdrive transmission; the 112 bhp dual-manifold version of the 226 was standard equipment on all K492 Kaiser Deluxe models. The body was built for a car destined for domestic (rather than export) sale. It was equipped with Accessory Group #3 as were all Virginians; this included electric clock, rear seat cigarette lighter set of 5 chrome wheel discs, tail pipe extension (the flat deflector) front cigarette lighter, 2 front and 3 rear bumper guards, heavy duty air cleaner, vaccuum booster fuel pump, siare tire and tube mounted on spare wheel. Factory installed options included heater/air conditioner (conditioned air, not cold air) rear wheel shields, overdrive and set of 5 white sidewall tires rather than blackwall tires.
Because the ITEM number appears to be punched out the fill information on the date the body started through fabrication (before paint and trim lines) Date body started down the production line