Large serving spoons in silver 830s by various manufacturers

From the left in the picture:

1. Serving spoon 26.5cm by O Domaas NOK 1600
   
2. Serving spoon 26.2 cm by Sverre Mauritzen NOK 1000, with monogram on the front and date on the back, small impact marks in spoon pit therefore reduced price.
   
3. Serving spoon 25.5 of unknown NOK 1000, with the engraving "Livar" on the back
   
4. Serving spoon 26.0cm by T O NOK 1800