The Helmut Quakernack has no fingering numbers, there are 3 volumes.
Here are some photos of a few pages of the 3 volumes:
http://www.stretta-music.com/author-helmut-quakernack
The Scappini and Fugazza free bass methods do have the numbers for the fingerings. Its true a method for beginners should include the numbers for fingerings, although some teachers use their own personal experience and change the ciphers.
This is a tutor for B-system accordion (standard bass + free bass pieces). There are 2 volumes
Music reader for Button accordion (Bayan). Music school 1-3. Pieces, etudes, ensembles, sonatinas and variations, polyfonical pieces. Ed. by D. Samoilov.
http://ruslania.com/sheetmusic/1525...ariations-polyfonical-pieces-ed-by-d-samoilov
I ordered the Vyatcheslav Semionov B-system bayan tutor a few years ago. Good book standard bass + free bass:
http://ruslania.com/sheetmusic/1531...emenov-texts-and-explanations-only-in-russian
I have this 200 pages (standard bass) accordion tutor:
http://ruslania.com/sheetmusic/1543...s-of-children-music-school-and-music-colleges
Author(s): Artyukhov P., Basurmanov A.
200 pages, Paperback
Published / Manufactured by: Kompozitor in 2002
or:
The First School of Polyphony for Bajan and Accordion. Vol. 1
«The first school of polyphony» by V. Bryzgalin is the first work written for bajan and accordion players which contains the detailed system of consecutive study of polyphony: from simple examples to a complete mastery and has no analogues among the world pedagogical-musical literature.
«The School» consists of «Young Musicians Dictionary of Polyphony» and 3 exercise-books (parts), published separately, but constituting one whole thing.
Being originally organized «The School» is therefore not only a manual which answer the repertoire requirements of schools, concerts and festivals, but is also a theoretical supply containing vast knowledge in polyphonic study.
Author(s): Bryzgalin V.
84 pages, Paperback
Published / Manufactured by: Bryzgalin-MirNot in 2001
There are many fine accordion and b-system bayan tutors, but in the texts are in Russian...