Hello James and Hugh and all,
I think this is a case where the King Size series have yet to be put into a variation table format on a web site or in printed book form. From time to time these variations have come up but as we have found with online data it also disappears again. I think about 5 forum members have indicated they have K11a metal hub versions.
When the K11a Fordson and trailer was first produced it was known to have silver hubs.(suggested pre-pro)
The coloured metal hubs you speak of may be same as used on the K4 McCormick International B-250. If you have the metal hub version of the K4a you will see they are the same as the K11a.
If you have a metal hub K4 and a metal hub K11 perhaps you can measure as per note below.
It is also possible that some of these sold by auction houses have not been accurately described given it takes a real close look to be able to spot the difference between the metal and plastic online.
When this K11a model was discussed on the Lefora forum it became confusing because another kingsize models was entered into the discussion plus with wheels, hubs and tyres description confusion.
I felt it was important to save some of this information in particular the variation table compiled by Jason. More detail was being added by Antonin and not long after that forum closed and the new VBD started.
As we know a lot of the photo links either do not work or send you to a wrong photo or have duplicated photos. This makes research complicated.
Here is the variation listing as of July 2013 thanks to Jason. (unedited)
K11A FORDSON TRACTOR
1/ALL ORANGE METAL WHEELS.SILVER STEERING WHEEL.NO SILVER TRIM.POOR
1A/ORANGE METAL REAR WHEELS, PLASTIC FRONT.SILVER STEERING WHEEL.WITH SILVER TRIM.FAIR
2/BRIGHT ORANGE PLASTIC WHEELS.SILVER STEERING WHEEL.WITH SILVER TRIM.FAIR
3/ ORANGE PLASTIC WHEELS.SILVER STEERING WHEEL.WITH SILVER TRIM.FAIR
4/ORANGE PLASTIC WHEELS.BLUE STEERING WHEEL.WITH SILVER TRIM.FAIR
5/DARK RED PLASTIC WHEELS.SILVER STEERING WHEEL.WITH SILVER TRIM.WITH MATCHBOX ON THE BASE.FAIR
6/BRIGHT RED PLASTIC WHEELS WITH INSIDE BRACES.BLUE STEERING WHEEL.WITH SILVER TRIM.WITH MATCHBOX ON THE BASE.FAIR HOOK BROKEN
K11A FARM TRAILER
1/NO TRIANGLE BRACE ACROSS SUPPORT ARM.RED METAL WHEELS.GREY HYDRAULIC RAM FAIR
2/NO TRIANGLE BRACE ACROSS SUPPORT ARM.RED PLASTIC WHEELS.GREY HYDRAULIC RAM.FAIR
3/WITH TRIANGLE BRACE ACROSS SUPPORT ARM.RED PLASTIC WHEELS.GREY HYDRAULIC RAM.FAIR
4/WITH TRIANGLE BRACE ACROSS SUPPORT ARM.RED PLASTIC WHEELS.BLACK HYDRAULIC RAM FAIR
5/WITH TRIANGLE BRACE ACROSS SUPPORT ARM.RED PLASTIC WHEELS.BLACK HYDRAULIC RAM.WITH MATCHBOX ON THE BASE OF THE TIPPER.FAIR
6/WITH TRIANGLE BRACE ACROSS SUPPORT ARM.BRIGHTER RED PLASTIC WHEELS.BLACK HYDRAULIC RAM.WITH MATCHBOX ON THE BASE OF THE TIPPER.FAIR TOW HOOK GONE
Here are the hub size diameter outside rim as measured by Bert
Metal 11.5 and plastic 10.7mm front hub
Metal 16.9 and plastic 15.0mm rear hub
James
I like your photos in particular the one showing the four models with a view of the base highlighting the varying degree of rivet finish.
Another interesting feature of this model is that many of the steering wheels were damaged during the tumbling and assembly process.
Hook profiles also differ on the tractor. ( also noted by Matchboxfreak Kurt on 27 May 2014 with this forum)
I am sure when Antonin reads this he will reinstate his photos with more detail along with new finds in his model farm.
Hope this helps
Bert