Hello Paul, sorry for late reply.
I think I would feel quite happy to regard the star as Lewis's own, given the engraving, the reason that I asked was simply that most original stars given to members of his battalion bare the sixth cycle Birmingham marks for 1902-03. the lion passant on the ring is certainly a generic point to note on these stars.
I dare say the missing marks are nothing more than a rare error, to be quite honest, I don't think it matters too much really.
With the casualty date, I had always believed that the regiment had been part of the 2nd Infantry Brigade, 1st Division of Haig's 1 Corps, therefore, they would have taken up position facing east, well to the south of Mons, between the Mons Conde canal and the river Sambre.
Given the disposition of the regiment, I would be compelled to think that if the date shown in WO363 is correct, then two possibilities present themselves, he was either detached from his battalion for some reason, or, he was possibly the victim of an accidental discharge, very unfortunate if so.
On Friday the 21st, French issued an order sending the Cavalry Division to Thulin to act as a flank guard once the Infantry Brigades were actually in position.
On Saturday the 22nd, at daybreak, the 2nd Cavalry Brigade had pushed a few of it's scouts all the way out to Obourg and it was they who fired the opening shots of the war as far as the BEF was concerned, when they chanced upon some of their opposite numbers from an Uhlan regiment.
On Sunday the 23rd it was actually members of 2 Corps that held the line of the canal that were heavily engaged, with 1 Corps taking virtually no part whatsoever.
All of that makes me wonder about the date given for that wound, of course, the reality is that we will be unlikely to ever know for certain.
If he had not got the chop when he did, I would have been very surprised if he had come through, by September, his regiment had almost gone and with it, most of the BEF, the last of the red little army, gone for ever.
Still a very fine group though, I would be very happy indeed with it.
Regards Frank