This might be a stretch, but not so long ago, there was a report of a mask that looked exactly like the gold Pakari on this prototype. At the time due to lack of further evidence, I could only conclude that it was a spraypainted version, but a small possibility is arising that it might have to do with this Takua prototype… we would need further context from the owner.
I do not know if those gold parts are painted or actually molded, but we know at least the mata hand did exist in color 147 (Takanuva’s gold) when Takanuva was prototyped. There was also a gold (147) kohlii stick, so who knows…
EDIT: Looks like I am not the first one to find this, but I haven’t seen much discussion about it, other than a single brief BZP topic.
I’ve always wondered about that arm design, but I somehow never considered that they could be based on prototypes (despite countless other design discrepancies across multiple forms of media being for the same reason).