Vintage-Style Brass Aneroid Barometer, Marked Seth Thomas

This item appears to be a vintage-style brass aneroid barometer housed in a heavy, port-hole-style polished brass casing with mounting holes along the rear flange, consistent with traditional marine or nautical instruments. The silvered metal dial features clear printed markings in both inches and centimeters, as well as millibars, detailing barometric pressure readings. Standard weather designations such as 'RAIN', 'CHANGE', and 'FAIR' are displayed across the upper arch of the face. The dial bears printed text reading 'Seth Thomas' in a cursive script, which is consistent with items produced under that brand name; however, full physical inspection would be required to verify absolute origin and internal mechanical functionality. A central adjustment knob sits atop the glass cover, controlling the reference pointer hand. Condition-wise, the brass body shows light surface wear, minor dust, oxidation, and faint smudging consistent with age and previous display. The glass cover appears intact without major visible cracks. Overall, the piece displays solid metal construction and classic maritime design aesthetics characteristic of mid-to-late 20th-century brass weather instruments.

Based on what I can see in the provided image, this item is a vintage-style nautical aneroid barometer housed in a heavy brass port-hole casing. The dial displays standard weather designations alongside pressure readings and bears text reading 'Seth Thomas' in a cursive script. However, I cannot verify internal mechanical functionality or absolute origin from a photo alone; a full physical inspection would be required to confirm whether the movement is fully operational and correctly calibrated. Assuming the attribution to Seth Thomas is accurate and the brass housing and internal movement are period-correct, comparable mid-to-late 20th-century brass weather instruments typically achieve between $60 and $120 in the secondary market. Decorative maritime instruments from this era remain popular for coastal and traditional interiors, though market demand generally favors fully working models with minimal patina. The value estimate assumes the brand marking is legitimate and the mechanism functions. To firmly establish authenticity and mechanical integrity, an in-person examination by a clock or scientific instrument specialist would be necessary, along with any available provenance documentation. Should physical inspection reveal this to be a later reproduction, a modern decorative copy, or non-functional, the market value would likely drop to the $20–$40 range purely as a decorative wall piece.