Armbåndsuret er en automatklokke.

Because Norwegian usually writes compound nouns as one word.

Here, armbåndsuret is built from:

• armbånd = wristband / bracelet
• linking -s-
• ur = watch / timepiece
• -et = the definite ending for a neuter noun

So Norwegian treats this as a single compound noun, not as separate words.

Because ur is a neuter noun: et ur.

In Bokmål, a neuter noun often forms the definite singular with -et:

• et ur = a watch / a timepiece
• uret = the watch / the timepiece

The same thing happens in the compound:

• et armbåndsur = a wristwatch
• armbåndsuret = the wristwatch

The definite ending goes on the last part of the compound.

In Norwegian, the is usually attached to the noun as an ending instead of being a separate word.

So:

• armbåndsuret = the wristwatch

You do not normally need a separate word like English the.

A separate word such as det is often used when there is an adjective:

• det fine armbåndsuret = the nice wristwatch

So the short answer is: Norwegian often puts the at the end of the noun.

After er (is), Norwegian usually uses an indefinite noun when you are saying what something is or what category it belongs to.

So:

• Armbåndsuret er en automatklokke = The wristwatch is an automatic watch

This means it belongs to that type.

If you said automatklokken, that would mean the automatic watch, referring to a specific one already known in the conversation.

Because the two nouns have different genders.

• et ur → neuter
• en klokke → common gender

The word automatklokke ends in klokke, so it takes the gender of klokke:

• en automatklokke

This is very common in Norwegian compounds: the last part usually determines the gender.

That -s- is a linking sound used in many Norwegian compounds. It is often called a fuge-s.

So:

• armbånd
  • ur → armbåndsur

It does not mean possession here. It just helps join the two parts into a natural compound word. English learners often want to interpret it as ’s, but that is not what it is doing in this word.

They are related, but not identical.

• ur is a more specific or slightly more formal word for a watch / timepiece
• klokke is a very common everyday word that can mean clock, watch, or appear in compounds

So armbåndsur is a specific word for wristwatch, while automatklokke is a type of watch, namely an automatic one.

Using both in the same sentence is fine.

You could, but it is not exactly the same.

• automatisk is the adjective automatic
• automatklokke is the noun automatic watch

So:

• Armbåndsuret er en automatklokke clearly says what type of watch it is
• Armbåndsuret er automatisk sounds more like you are describing a property of it

If you specifically mean a self-winding mechanical watch, automatklokke is the more precise choice.

This is the normal word order for a simple Norwegian statement:

• Armbåndsuret = subject
• er = verb
• en automatklokke = complement

So the pattern is basically:

subject + verb + noun phrase

In that sense, it looks very similar to English.