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 a typical 18th-century Spanish weapon, designed to be stuffed down a musket barrel when out on a boar hunt or in a military context. Amazingly, it appears to have most of the original scabbard, with the top chape of pressed tin with a decorative motif. The bottom chape is missing.

This is likely to have been made towards the end of the American Revolutionary War (Peace of Paris, 1783) or during the early part of the Napoleonic Wars (starting 1793). This would have been carried by an RN officer or HEIC naval officer, and this example is interesting in having a particularly long (approx 26") blade.

This hanger is almost certainly of German origin, probably the Oels family of Brunswick (the hereditary dukes) because of the presence of the gold 'O' featured in four places on the mounts. An unusual feature is the ovoid pommel, similar to that of a smallsword of the period.

These dirks would have been carried by Royal Navy as well as merchant marine officers, even, rather more rarely, by army officers. This classic dirk has a whalebone haft (which, at first glance, might appear to be of walrus ivory, but on closer inspection is definitely whale bone) and iron mounts. The style of hilt, pommel and grip dates it.