Emergency services were called to High Road (Credit: Google Maps)
The 48-year-old victim suffered a head injury during the assault in High Road at around 2.10pm on Monday, 23 August.
He was rushed to hospital where his condition was found not to be life-threatening.
The suspects took his watch during the attack and then fled the scene in a vehicle before police arrived.
No arrests have been made and officers are appealing for witnesses to come forward.
Anyone with information should contact them by calling 101 quoting 3910/23AUG.
To remain 100 per cent anonymous call Crimestoppers on 0800 555 111.
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