The following links provide useful information on past and present project associated with legacy seismic data and resources to access critical material such as station bulletins.
Project SISMOS (INGV)
EUROSEISMOS (ESC WG – INGV)
https://storing.ingv.it/es_web/index.htm
TROMOS project (INGV)
http://storing.ingv.it/tromos/
IASPEI Sub-Committee Historical instruments and documents in Seismology
http://storing.ingv.it/tromos/his/sc-his.htm
Iceland Analog seismograms
Spanish National Archive of Geophysical Data (IGN)
https://www.ign.es/web/ign/portal/archivo-datos-geofisicos
Analog Seismograms in Catalonia (ICGC)
Analog seismograms from Denmark and Greenland and old bulletins
https://www.sa.dk/daisy/arkivskaber_eller_arkivserie_liste?d=1&e=2016&c=seismogram
KNMI (Netherlands) scanned analog seismograms (EuroSeismos project)
https://dataplatform.knmi.nl/dataset/analog-seismograms-1
ISC station printed bulletins
http://www.isc.ac.uk/printedStnBulletins/
BCSF old bulletins and publications
https://www.franceseisme.fr/donnees/historiques.html
EOST- Strasbourg. Musée de Sismologie
http://musee-sismologie.unistra.fr/
IGN Spanish seismic bulletins
RACAB-ICGC Fabra observatory (Barcelona) seismograms and bulletins
BGS United Kingdom National Seismological Archive
https://data.gov.uk/dataset/99e7507a-c476-494b-b184-35b77dd06466/national-seismological-archive
ROB Belgian seismic stations history (French/Duth/German)
https://seismologie.be/fr/le-service/historique
https://seismologie.be/nl/de-afdeling/historiek
https://seismologie.be/de/abteilung/geschichte
INFP Romanian analog seismograms and bulletins
http://archive.infp.ro/index.php
Uppsala Observatory seismic Bulletins
http://www.axelhamberg.se/Bulletin/Engelsk.htm
Useful publications
G. Ferrari (Ed.) (1997). Proceedings of the Workshop Historical Seismic Instruments (Walferdange, Luxembourg, 16/18 May, 1994)
J. Schweitzer & W.H.K. Lee. Old Seismic Bulletins to 1920
https://dgg-online.de/WordPress_01/wp-content/uploads/2015/06/IHB-C881.pdf
SRL – Focus Section on Historical Seismograms (2020)
https://pubs.geoscienceworld.org/srl/issue/91/3
Former USSR seismic stations and seismograms
C. Shishkevish (1974). Soviet Seismographic Stations and Seismic Instruments. Part I
https://www.rand.org/content/dam/rand/pubs/reports/2009/R1204.pdf
C. Shishkevish (1975). Soviet Seismographic Stations and Seismic Instruments. Part II
https://apps.dtic.mil/sti/citations/ADA016246
J. Batlló (2004). Spanish old seismographs catalog (in Spanish)
http://www.ign.es/web/resources/sismologia/publicaciones//Catalogosismografos.pdf
M. Van Camp & T. Camelbeeck (2004). Histoire des Stations Sismiques Belges (in French)
https://publi2-as.oma.be/record/1565/files/CT2004_06_VanCamp_Camelbeeck.pdf
L. Rivera, S. Lambotte & J. Fréchet (2021). Historical Seismograms at Strasbourg
https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.90/
Grolimund & Fäh (2021). Instrumental Earthquake Observation and Documentation by the Swiss Seismological Service in the Early Instrumental Period 1912–1963.
https://www.research-collection.ethz.ch/handle/20.500.11850/465552