I think that all the Cdn3 data plates would have had the 121301 ECC from the factory. The ECCs would change upon the installation of an adapter kit. The actual ECC for a 106 modified Cdn 3 was 121310. The mod instruction for the 106 recoiless rifle adapter kit mentions that:
"EQUIPMENT CONFIGURATION CODE
2. On completion of this instruction the truck, 1/4 ton ECC 121201, ECC 121201 or ECC 121301 will be converted to ECC12110, 121210 or 121310 respectively."
Those would be the ECCs for the M38A1 (53 pattern), the Cdn2 (67 pattern) or the Cdn 3 (70 pattern) jeeps.
The Cdn3 CFR shown in the photo is out of sequence for what I normally saw on recoilless jeeps. With the basic ECC on the bumper, it may have been that the kit was installed for the UN deployment. Most of the ones I ever saw were around the 09000 CFR range. Those were converted at a higher level of maintenance than second line. I recall one of the civilian employees complaining at base maintenance that after they had spent considerable time installing the recoilless installation kits on a batch of 53 pattern M38A1s, they hadn't even issued them when the Cdn3s showed up with the installation kits already on them.
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