My understanding is someone made a run of these stainless thermowell pots for the Chambers stoves in the 1980's/90's. Sound rather hard to come by anymore, also these are easy to clean, won't dent like the softer aluminum and this one even has the vegetable tray inside. Measures as follows: across the top is 9 1/8", bottom 9", and is 7" high to top of latch. Is heavier and much sturdier than the aluminum pots. No markings but as the measurements show will fit most if not all Chambers deep well but you measure yours first before bidding/buying. USPS Insured to the lower 48 USA ONLY.