Richard Montague of Germany pictured in April 2011 standing in front of the concrete FINOSE tripoint boundary cairn erected in 1897 near the shore of Golddajärvi.  Mr. Montague is standing on Finnish territory, behind him lies Norway and to the left of his position in the picture lies Sweden. This monument was built as late as in 1897, even if the boundary between Norway and Sweden as far northeast as to "Bihtošmaras" cairn, border marker 348, right south-southeast of Polmak (at 69°53' N 28°21' E), was finished demarcated as early as in 1766.  But the point, 250 Swedish ells (about 150 metres) west of border marker 294 (which until 1897 often was misinterpreted as the northernmost point of Sweden) was not agreed upon until the 1809 Treaty of Fredrikshamn – simply because Finland was Swedish territory until then. From 1810 the tripoint was marked as the midpoint between two small markers (both numbered "1")  put on each side of the outlet of Kuokimajoki Creek, which from this moment was renamed Rajajoki Creek ("Border Creek"). In 1897 these two small markers was reported not found and might have been lost.  
(Photo: © Richard Montague.)

Mr Montague at the Swedish side with King Oscar II's monogram and the Swedish national emblem – the Three Crowns.

And finally Mr Montague at the Norwegian side with King Oscar II's monogram and the Norwegian national emblem – the Norwegian Lion. Until 1905 King Oscar II ruled two kingdoms, each with its parliament. 

The first photo of the border cairn at Golddajávri, taken i 1897, when it marked the tripoint between Norway, Russia and Sweden. ¹⁾

Note that the Imperial Russian coat-of-arms appear on the heartstone atop the monument in these photographs, where today the word Suomi appears.  "N II" stands for Nicholas II, Emperor of Russia.  The Finns changed the arms on the heartstone after Finland became a separate, independent country.

Photo of the offical border commission at the new-erected tripoint cairn (1897). ²⁾

This map by L. S. Delarochette published in 1794 shows the common Norwegian-Swedish border goes all the way up to the Lake Enare, according to the Norwegian-Dano claim. By this time the Norwegian-Swedish boundary was only demarcated until Polmak. Finland was at this time a part of Sweden.

Until 1809 the NORUSE tripoint was according to the Norwegian position situated about where FINORU now is located. The map also presents that Norway claimed land between Pasvik River and Fisherman Peninsula, about the same territories which in 1920 by Lenin was granted Finland.

Please find a full map over the area here.  Position 69° 03' 35.88712"N 20° 32' 55.09099"E  (EUREF89 datum).  
Map: © Statens Kartverk, Oslo, Norway.

This point is located almost 500 metres above sea-level.  The boundary is changing direction at boundary marker 294.

1901 Border Commission map with the Norway - Russia - Sweden tripoint marker named "The Koltajarve Column". Russian - Swedish border markers 1, 1A and 1B are also mapped.

Map of the Rajajoki Creek and surrounding after the execution of the work of the 1901 Joint Border Commssion.  The tripoint border was decided to be situated exactly in the middle of the Kuokimajoki Creek outlet. In 1810 it was demarcated first time when one border stone was put at each bank. 87 years later the tripoint cairn was erected.  This tripoint cairn has no number. ³⁾

The trifinium marker itself is accessible by a small wooden bridge from Finnish side. Distance from FINOSE to Rr 294 is 147,8 metres.

Official clickable map over the area (big range). 

Official clickable map over the area (small range). 

Official Finnish map over the trifinia area. Note that the map of the trifinia area does not correspond fully with the ortomap. 
(From Karttapaikka.)