I noticed today a Listing for an Aldis on eBay UKicon: WW1 Aldis Pattern No.3 Sniper Scope for SMLE .303 | eBay

Do I see it right that this Aldis was originally on a H&H mount since it has the rifle markings on the scope tube (compared to the Purdey which had the rifle markings on the scope ring)? Seller also claims it is a 3rd Pattern Aldis scope, while I'm not an expert this looks more to be one of the earlier made scopes. So were the first ones made already 3rd Pattern?
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