This is a mix, there are 3 valves that are IVAM brand, and 2 that are TRW brand.  The dimensions are the same.  The discoloration you see in the photo is Cosmoline and will wash off with solvent.

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Buyer is responsible for confirming compatibility and proper installation before use. Professional installation is recommended. Due to the nature of NOS, used and vintage automotive components, buyer assumes responsibility for inspection and safe use before installation. By purchasing this item, the buyer acknowledges and agrees to these terms.

Location: FLR11