The Ostehøvel, or Osthyvel as it is known in Sweden, has come to symbolise breakfast in the two countries in the years since it was patented by the Norwegian inventor Thor Bjørklund back in 1925.
Linus, the unemployed journalist managing @Sweden, Sweden's official Twitter account, this week began posting pictures of himself holding the instrument on Wednesday, apparently ignorant of its Norwegian origins.
This is what we in Sweden call an "osthyvel". pic.twitter.com/cxalRbO3PZ— @sweden / Linus (@sweden) June 9, 2014
He posted a series of jokey follow-ons, including:
But then Johannes Björk, a Sweden PHD student living in Barcelona, pointed out that the implement was not in fact Swedish.
At this point, Sweden's official Twitter account took the momentous step of threatening to "annex" the invention.
The threat generated an immediate response from Norwegian Twitter users (well, one Norwegian Twitter user).
.@AwfulDodger This cannot, WILL NOT, be accepted. We will annex the Osthyvel. It is our birthright.— @sweden / Linus (@sweden) June 12, 2014
Björk then stepped in and graciously asserted Norway's right to take credit for the much-loved implement.