Please note that condition is represented by reference to the images. Any major problems not readily seen in scans are noted.
 

Stock #2041, Mounted Collection of Official Mail, 1880/1910, 17 stampless from 8 different origin towns attractively mounted, includes 1880 uses from  Hanumannagar and Pokhara (blue pmk), 1883 from Kalaiya (blue pmk), all covers either ex H. S. Gupta or ex A. Singer collections, very fine group, PDF file here

Price $950.

Stock #2110, Group of Official Mail from Gupta collection, 1880/1910, 18 stampless (3 missing stamps on front), incl. a couple scarcer postmarks, faults, PDF file here

Price $300.

Stock #2042, May 1888 Registration Receipt book of Kathmandu office showing daily entries, each entry handstamped with Kathmandu postal seal, on original page as mounted by Hellrigl (illustrated in Corinphila's "Edition D'Or" book of his collection on page 133), document has been refolded down 2" at top to fit

Price $150.

Stock #2040, February 1891 cover from Kadarban to Kathmandu, small barred initial cancel, prepaid with 1 anna dark blue, ex Sanford, reduced at right, reverse side here

Price $200.

Stock #2039, June 1897 Chisapani to Kathmandu, clear barred initial cancel, postmark without datefield on reverse as well as hand-dated negative postmark, prepaid with 1 anna blue, ex H.G. Gupta, reverse side here

Price $250.

Stock #2037, November 1901 cover from Birganj to Kathmandu, barred initial cancel, prepaid with 1 anna stamp affixed by the same glue used to seal the envelope, signed Holcombe, ex Sanford, edges aged, reverse side here

Price $125.

Stock #2032, March 1902 cover from Ridi with clear barred initial cancel, prepaid with 1 anna recut, ex Singer (illustrated on page 93), reverse side here

Price $150.

Stock #2033, November 1902 cover from Doti to Kathmandu, barred initial cancel, prepaid with 1 anna recut, ex Gupta, reverse side here

Price $100.

Stock 2030, November 1902 use of 1901 One Anna on European White Paper, (Scott #23b, stamp cat $1,000) stamp insect damaged, tied to 1902 cover by Gahawa (Birganj) barred circle cancel and with Birganj dispatch postmark of Nov 15, 1902 on back, used to Kathmandu, ex Hardayal Singh Gupta and with Flack certificate (here)

Price $200

Stock #2109, May 1903 Karnali to Kathmandu, their dispatch backstamp, franked with 1 anna recut tied by barred initial cancel, reduced slightly at right and aged, ex Gupta

Price $100.

Stock #2038, July 1903 cover from Kadarban to Kathmandu, clear barred initial cancel, their manuscript dated boox dispatch postmark on reverse, prepaid with 1 anna recut, ex Singer (illustrated page 93), reverse side here

Price $175.

Stock #2035, March 1904 double rate cover from Birganj to Kathmandu, prepaid with pair 1 anna recuts, ex Sanford, address side here

Price $350.

Stock #2031, April 1904 large part registered cover with original letter from Karnali to Kathmandu, strip of four 1 anna recuts tied to reverse and a single on address side which is apparently missing another adhesive, ex H. Singh Gupta, address side here

Price $150.

Stock #2036, July 1904 cover from Hanumannagar to Kathmandu, prepaid with 1 anna deep ultramarine recut, postmark dated in manuscript, ex Sanford,  address side here

Price $150.

Stock #2034, April 1908 cover from Birganj to Kathmandu, prepaid with 1 anna deep ultramarine recut, ex Sanford, a slightly late use, reverse side here

Price $150.

Stock #2046, July 1898 official, unfranked mail cover from Kuti court in Tibet to Kathmandu, entered Nepal mails with Tatapani customs postmark, ex Singer and illustrated on page 127 of his book

Price $150.

Stock #2045, 1901 cover from Vakil (Lhasa Legation chief), Tibet to Kathmandu, addressed to P.M. Rana, with Singer's note for the cover which mentions, "Vakil covers from Lhasa are far less common than from Kuti

Price $250.

Stock #2047, three covers, Kerong court, Tibet to Kathmandu, ex Gupta

Price $100.