Helsinki /Helsingfors/-based workshop. Active during 1871-1898 time period. Looks like it also was a supplier for Mellin workshop https://asiamedals.info/threads/badges-of-excellence-for-faultless-service-made-by-otto-roland-mellin-workshop-r-m.23241/#post-355600
40 years of service on...
badges of excellence for faultless service
imperial russian badge
imperial russian badges made in finland
russian badge for faultless service marked pa
russian badge made by petter airaksinen
знак императорской россии
знакотличиябеспорочнойслужбызнакотличиябеспорочнойслужбы petter airaksinen
знакотличиябеспорочнойслужбыклеймоpaзнакотличиябеспорочнойслужбы частник
мастерская petter airaksinen
нагрудный знак императорской россии