Luga. 1870-76, embossed (5k) in blue, four oval-shaped stamps in various shades, flawless quality, full/large part of OG, VF, C.v. $360 (Image)

Luga. 1877, embossed (5k) in light (milk) blue, rosette-shaped stamp, excellent condition, full OG, previously hinged, VF, Schmidt #6, rank ''RRR'', reportedly only four examples known, ex-Kuznetsov (Image)

Luga. 1877, embossed (5k) in blue, two rosette-shaped stamps of lighter and darker shades, excellent condition in every respect, full OG, LH, VF and scarce in such quality (Image)

Luga. 1919, Soviet issue, 5k-5r, complete set of six, fresh quality, no gum as issued, VF (Image)