Egg flintlock trombone

datable to the end of the 18th century, produced by the famous London manufacturer Durs Egg for the "United East India Company": two-row iron barrel with engraved rings at the gearbox; military-type battery, the manufacturer's signature and the Company's symbol with the date "178 ..." appear only partially legible on the folder; wooden crate with mounts and iron rod; in good condition; rare L cm 66