Bulgarian /Ukraine ID Help Needed Please

Hello, Will someone please give me Scott numbers for these? I know the first scan and the first stamp in the second sxcan are Bulgaris but I don't have an A_B catalog. The last one in the second scan is Ukraine but I don't see this stamp in Scott. The middle three I can't figure out.If possible please give me Scott numbers and date of issue. The bulgarian stamp in the second scan is dated 1935.
As always I am indebted to you
David

In the Scott catalog, from left to right:

Row 1
Bulgaria #611, 614 (18May1948)
Bulgaria #164 pair (1923) (there is also a dull violet variety, #163, issued in 1921).

Row 2
Bulgaria #275(10Jul1935)
Montenegro #95, #91 (28Aug1910)
Montenegro #AR1(1895)

The bottom right Ukranian stamp is mentioned in Scott but not assigned catalog numbers. It is part of a set of 14 that were printed in 1920 but not officially issued -- although I believe used copies do exist. The set exists perforate and imperforate, and lots of printer's waste EFOs.

khj, As always you have been a great help and excellent information
Thanks
David