I purchased this set today for $35.00 hoping it'd be one of the youngest sets. Not so. I'd long forgotten that there were sets in the 47 thousands and there's probably sets nudging the 50 thousands. Or, did Gough's nudging of the tariff wall beat Kriesler to it?

33319 puts yours between:

24787 - 4 Aug 1970, silicon diode rectifier

and

34968 - 24 Mar 1972

--- on our list, so it's interesting that it has a 6V4 rectifier. We have a set dating at 1969 with a silicon diode rectifier, and others with a silicon diode dating from 1970.

Yours appears to have the original serial number tag riveted to the chassis.

Is there a date stamp on the transformer?

I didn't notice any date stamps anywhere when I had the back off. I will have another look tonight after tea. It would be odd if they were making two models simultaneously. I got the valves off the circuit diagram.

Okay, the fact-finding mission is complete. Scrap the 6V4 - whilst this is showing on the circuit diagram there is a half-wave rectifier in its place in the form of a silicon diode. This is alongside a 47μF filter - it'd have to be that big to filter a half-wave rectifier.

No date stamps anywhere though. Perhaps, going by the serial numbers (and if most of the radios in the above timeframe were purchased in the lead-up to Christmas), this may be a 1971 model? It'd be good if it was because that'd make this radio my vintage.

No date stamps anywhere though.

That's odd, given its neighbours on the list. What about the caps?

Here's the updated serial number list with Brad's recent acquisition added:

Serial Numbers:
189 - 6 Aug 1965 on transformer
4969 - (date?), 6V4, no groove on back, ARTS&P cyan AC075205
10036 - 24 Apr 1968, 6v4 rectifier, dates on the IF cans. 6v4, 2 wire, paper caps 20 and 25μF electro's
10835 - 30 May 1968, 6v4 rectifier, 2 wire mains cord, mix of mustard and paper caps. 30 and 40μF electro's
11148 - (date?), 6V4 rectifier
16310 - approx Mar 1969 - 6V4 rectifier and caps marked 059 and 079, ARTS&P label AA 879187
17412 - (date?), 6V4 rectifier, wax caps marked xx6 and ARTS&P label AA 998629
19039 - 26 Aug 1969, 6V4, groove on back, ARTS&P cyan AB697937
20741 - 13 Nov 1969 on power transformer
20893 - 18 Nov 1969 on IF can - silicon diode rectifier
23428 - 27 April 1970 on power transformer, silicon diode rectifier
24787 - 4 Aug 1970, silicon diode rectifier
33319 - (date?), silicon diode rectifier
34968 - 24 Mar 1972
38406 - 19 July 1972
42422 - 5 May 1973, silicon rectifier, 3 wire mains cord
45967 - 6 Mar 1974
46532 - 11 May 1974, silicon diode rectifier, groove on back, no ARTS&P label (*)
46591 - 25 Apr 1974
47210 - 16 June 1974
47874 - 2nd July 1974, silicon diode rectifier, 3 wire cord with the "notch", black dial face, mustard caps 20 and 25μF electro's.

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(*) Note apparent anomaly in the dates between 6 Mar and 25 April:

Going by existing information, this set of Brad's should have a 3-wire power cord wedged into a groove in the bottom of the case.

Due to the known bad design, the grey cover of the cord may be damaged or cut where it comes out.

As I noted on page 7, the schematic was never updated when they got rid of the 6V4.

I purchased this with the cord cut off. Yes it is a 3 core PVC job. I tucked the stub back inside when screwing the rear cover back on.