Good evening,
If you lok at this close up I would say there are two more tassels. You can just make out the outline of the sporran and cantle badge. That will be in the centre so the two blackened tassels are also central. That means there are two more but the poor quality photocopy has blanked them out.
There is no regiment other than the argyles who have this style of tassel in white. Black watch have the same style but in black and only 5.
The cap badge looks about the right size and shape also.
John915