The Three Crowns series on its way out . . .
Three different definitive stamps were issued on 20 January 1969. Different series and different motifs - yes, but also representing different issuing policies.
The 10 öre denomination from the series Definitive Stamps came as a booklet, the same with the 50 öre green Gustaf VI Adolf type III and then there was the 2 kr wine-red Three Crowns. This was the last stamp of that series. The first stamp of the Three Crown series, the 60 öre red-carmine, was issued on 10 February 1939, almost 30 years earlier. The series came in 34 denominations. The original idea was that this series should cover the fees for the most common postal rates for domestic parcels and C.O.D. parcels. That was not the case with the 2 kr wine-red, it could be used a single stamp for domestic letter -250 g, it could also be used for various money orders until 1971 and later on used for international letters -50 g between 1975 and 1976. Read more about the Three Crown series - here.
The 10 öre blue/black Swedish ship in Öresund represents the new kind of definitive stamps that showed up for the first time in 1965, like the Posthorn and the Ale's Stones. The 10 öre belongs to the series called Definitive Stamps and it was first issued in 1967. The series emphasized the new issuing policy of Swedish Post with definitive stamps in smaller series and adding the concept with different motifs within the same series. That was a big novelty in 1967. The Definitive Stamps series and the Iron Age slot machine booklet were examples of that. Why Swedish Post almost two years later choose to issue a booklet with twenty 10 öre stamps from that series beats me.
The 50 öre green Gustaf VI Adolf was first issued as a two sided perforated stamp in January 1968 and now a year later it also came in a booklet with ten stamps. There was an earlier 50 öre stamp in the series, the 50 öre olive-green from July 1962 where its single use covered International Letter - 20 g until July 1964. The reason why there was a new need for that denomination in the series was that the rate for C.O.D became 50 öre in 1967. Oddly enough the fee 50 öre lasted only until March 1969. That must have been some what of a bummer, but 50 öre probably did good use as a complimentary denomination for the following years.