What Are These Vintage Fiji Cancels/Overprints?

Going through a 1940s-era stamp album looking for CDS/SOTN cancels and these two struck me as interesting.

The first has a straight-line "TAVUKI..." that does not appear to be part of the postal cancel. I'm not sure if it is an overprint or another type of cancel.

The second appears to be a commemorative cancel of some sort, related to a 1924 (Philatelic?) Exhibition.

Any ideas?

Tavuki is a village on the island of Kadavu, south of the main Fiji island of Viti levu.

That straight-line cancel type was used in in many smaller villages in the early 1900's. Those villages did not have dated cancels, and the covers were almost always struck with additional Suva dated cancels once the letter reached the main G.P.O. for onward transit. Sometimes the Suva cancels also hit the stamps, other times they were clear of the stamps.

The violet cancel, I have no idea. It may be a revenue cancel.

The second is a boxed slogan cachet used in Suva from late 1923 to early 1924.
VISIT THE FIJI COURT
British
Empire Exhibition
1924

Coincidentally, I ran across a site for the British Empire Exhibition that has a short bit on the Fiji pavilion, here:

http://www.bee1924.com/fiji.html




Beats civet coffee, I guess.

Bumping this older thread.

I just found a similar stamp to the OP 1d KGV red. (Watermarked multiple crown and CA, so Scott 72). I can't match up any village or town, so am looking for help. This is a mint stamp, and the overprint is clearly impressed into the surface, showing pressure lines on the back. So, an overprint and not a cancellation, I believe.

Appears to be AVIUNI, but the right side shows a partial T (?). Thanks in advance.

Taveuni Island, Fiji with the overprint shifted so that the "T; is missing on the left?

https://www.fiji.travel/places-to-g...veuni-island

Taviuni or Taveuni? Very plausible with the missing T, but are both spellings permitted?