1863 H. Leue & Timpe advert, concern was founded in 1860 note that the advert doesn't include the court supplier title
1867 Royal Warrant for Mecklenburg-Schwerin, the only one I've found so I'm curious if he touts it from here on out?
1877 advert
Heinrich Leue had at least one patent from March 1881(17381) and from 1887 to 1890 joined forces with Max Knoll:
http://www.littlegun.be/arme%20belge/artisans%20identifies%20l/a%20leue%20et%20knoll%20gb.htmBy the early 1890s he had joined forces with W.W. Greener
1907 Advert
1863 advert, the earliest I've found of the Berlin address of Taubenstraße 9 where the concern opened a satellite office in 1860. H. Barella had another nephew named August Barella who along with H. Barella's son Max operated the Berlin & Frankfurt outlets. So I wonder if they also had a hand in the management of H. Leue?
Kind Regards,
Raimey
rse