NOS Grunau fire sprinkler head 1/2 NPT LD 280 F degree Upright STD SSU

23BD2101 up for sale is a new old stock Grunau   1/2 NPT solid brass vintage fire system sprinkler head , marked LD  280 F degree on paddle , body is marked  Grunau , marked LD on base top has Grunau  SSU sprinkler some have a blue  paint code on them , all our stock came from a building that was being renovated and these were in a working system , a bit dusty and dirty but appear to be usable or great for the collector , see our store we are adding more items like this weekly , thank you RWK

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