Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him) said:
There is nothing wrong with wearing a watch on either the right or left hand, like a ring, because it is proven that the Prophet (peace and blessings of Allaah be upon him) wore a ring on his right hand and left hand. End quote.
Fataawa Islamiyyah (4/255)
Shaykh Muhammad ibn Saalih al-‘Uthaymeen (may Allaah have mercy on him) said:
Putting a watch on the right hand is not better than putting it on the left hand, because a watch is like a ring, and there is no difference between putting a watch on the right hand or left hand. But undoubtedly putting it on the left hand is easier with regard to correcting it and looking at it, and it is safer in most cases, because the right hand moves more so it is more likely to cause damage to it.
The matter is broad in scope, so we should not say that the Sunnah is to wear it on the right hand, because it is narrated in the Sunnah that it is permissible to wear a ring on both the right and the left hand, and a watch is like a ring. End quote.
Al-Sharh al-Mumti’ (6/110)
The Permanent Committee for Scholarly Research and Ifta’ – alifta.net
Q 4: What is the ruling on men wearing watches on the right or left hand?
A: The ruling is flexible in this regard and it is permissible to wear it in the right or left hand, equally for men and women, just like rings.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions
The Permanent Committee for Scholarly Research and Ifta’
Member – Deputy Chairman – Chairman
`Abdullah ibn Ghudayyan – `Abdul-Razzaq `Afify – `Abdul-`Aziz ibn `Abdullah ibn Baz