Here is some information I translated from a website on Vetle for you to read. I apologise if I have made errors.
Øystein Vetle Marinsen was born in 1944 in Fredrikstad. At the age of 12, he got his first guitar, and he began to take an interest in rock'n 'roll at an early age. In the winter of 1957, Martinsen saw the film Rock around the clock. Now the interest came in earnest.

After this, Martinsen often performed at dance events with guitar and played rock songs, often backed by the orchestra that was present. He wanted to learn more, and he remembered the movie Rock around the clock. Here was the group Freddie Bell and the Bellboys. These used electric bass, an instrument that until then had been unknown in Norway.

Martinsen tried in vain to get such an instrument, before he decided to make one himself. He used an old orchestral guitar on which he put double bass strings. In order not to break the guitar neck, he had to tune it five semitones below the chamber tone. But then came the problem of getting an amplifier that could take the deep tone. He started experimenting, which resulted in several blown up speakers, but he found the solution in connecting two 12-inches in parallel, and then let it go.

In the fall of 1958, he started the swing rock band The Comets. This was disbanded in 1961. Martinsen then started The Rebel Rousers which later became The Cliftones, which was disbanded again in June 1985. In the late 60's, country music gained more and more space in the Cliftones' repertoire. Martinsen and the band participated in 1970 at Scandinavia's first country festival in Stavanger. From this festival came an LP where the group is represented.

On 14 August 1975, Martinsen participated alone at the C&W festival at Liseberg in Gothenburg - and won the competition for best artist / band.

In 1978, Martinsen went into the studio and recorded his first rockabilly production. This one came out on cassette called Rock that boggie. With him in Roxy Studio he had Bjørn Kristiansen (guitar), Øivin Fjeld (guitar), Øivind Nilsen (bass), Erik Bård Hansen (drums), Kjell Stensvik (piano) and Øystein Rene Magnussen (choir).

In June 1978, Martinsen met the legend Carl Perkins in Oslo during his European tour.

In 1980, the LP The Vetle Martin Story was released. This contains recordings from 1959 until 1980. The LP provides an insight into what Martinsen has done during this time period.

In August 1981, he met the Shadows guitarist Hank B. Marvin during a filming at Centralfilm's premises in Oslo. Martinsen was one of the 10 people who attended the event.

In 1982 came Rockin on my blue guitar, Martinsen's third solo release. All the cuts are instrumental, partly recorded in England and partly here at home. He was at the same time a guitarist on Kenneth Swanstrøm's LP Pumpin 'Piano Rock.

In August 1983, Martinsen moved to Pittsburg, Pennsylvania, USA. Here he was on the recording of Donna Danger's LP Cherokee Chick. Martinsen was also represented by one of the songs on the LP.

During this visit, Øystein Vetle Martinsen also managed to meet the guitar king Les Paul in his home in New Jersey. Here he got to see a lot of the equipment Les Paul has used and made over the years, including the world's first 8-channel mixer.

One Easter day in 1985, Martinsen met Elvis guitarist James Burton during his visit to Norway.

In December 1985 came Rockin Christmas, a mini-LP with old rock. Among other things, Kenneth Swanström's band plays on one of the tracks.

In the spring of 1986, Øystein Vetle Martinsen started as a guitarist in The Beatnicks.

Martinsen passed away on July 3, 2009.

Øystein Vetle Marinsen was born in 1944 in Fredrikstad. At the age of 12, he got his first guitar, and he began to take an interest in rock'n 'roll at an early age. In the winter of 1957, Martinsen saw the film Rock around the clock. Now the interest came in earnest.

After this, Martinsen often performed at dance events with guitar and played rock songs, often backed by the orchestra that was present.

He wanted to learn more, and he remembered the movie Rock around the clock. Here was the group Freddie Bell and the Bellboys. These used electric bass, an instrument that until then had been unknown in Norway.

Martinsen tried in vain to get such an instrument, before he decided to make one himself. He used an old orchestral guitar on which he put double bass strings. In order not to break the guitar neck, he had to tune it five semitones below the chamber tone. But then came the problem of getting an amplifier that could take the deep tone. He started experimenting, which resulted in several blown up speakers, but he found the solution in connecting two 12-inches in parallel, and then let it go.

In the fall of 1958, he started the swing rock band The Comets. This was disbanded in 1961. Martinsen then started The Rebel Rousers which later became The Cliftones, which was disbanded again in June 1985.

In the late 60's, country music gained more and more space in the Cliftones' repertoire. Martinsen and the band participated in 1970 at Scandinavia's first country festival in Stavanger. From this festival came an LP where the group is represented.

On 14 August 1975, Martinsen participated alone at the C&W festival at Liseberg in Gothenburg - and won the competition for best artist / band.

In 1978, Martinsen went into the studio and recorded his first rockabilly production. This one came out on cassette called Rock that boggie. With him in Roxy Studio he had Bjørn Kristiansen (guitar), Øivin Fjeld (guitar), Øivind Nilsen (bass), Erik Bård Hansen (drums), Kjell Stensvik (piano) and Øystein Rene Magnussen (choir).

In June 1978, Martinsen met the legend Carl Perkins in Oslo during his European tour.

In 1980, the LP The Vetle Martin Story was released. This contains recordings from 1959 until 1980. The LP provides an insight into what Martinsen has done during this time period.

In August 1981, he met the Shadows guitarist Hank B. Marvin during a filming at Centralfilm's premises in Oslo. Martinsen was one of the 10 people who attended the event.