Regarding the regiment, the Grenadiers had a very specific gorget with multiple pierce work on both wings, the Scots Guards normally had '3rd Guards' engraved on both sides at the tips, therefore, by elimination, this is almost certainly a Coldstream Guards example. The Dighton watercolours of the period appear to confirm this.

This iron-mounted sabre, dating from the early years of the Napoleonic Wars, would have been carried by a British officer in a cavalry or yeomanry unit. Singularly, it has a backstrap/pommel in the form of a lion's head, something I have never seen on this pattern in over 50 years of arms dealing. All I need is a good portrait to pin it down!

This is the classic Forestry cutlass worn by senior Foresters (denoted by the ivory grip and the gold/green knot) across Europe from the early 18th century onwards. They continued in use through the Weimar era and Third Reich, only latterly losing the by-knife. Lower ranks wore cutlasses with a stag horn grip and a plain green knot.

This is the SA dirk 1933 pattern, modified with a black finish to the scabbard by order of Korpsfuhrer Huhnlein in 1936. The RZM code stands for the firm Lauterjung & Co of Solingen. The top chape is engraved '15/24547' for Standarte 15, part of Nordmark Motorgruppe at Itzehoe, with the owner's personal NSKK number.

This was introduced in 1859 for the Royal Navy to supply a need for a cutlass and a bayonet in one weapon for the naval rifle of the era, a .577 Enfield cap and ball weapon. This is an A & E Holler example - ie a Solingen blade. There are no UK ordnance marks, so this is almost certainly an American export item.