In summer 2005 Martin Rundkvist and his team archaeologically investigated boat graves from the Iron Age and younger Viking Age in Skamby (Östergötland, Sweden). In one of the boat graves, apart from material remains of the boat, a horse gear, a red glass bead, a whetstone, an iron knife and 23 amber game pieces were found (see https://ww.lansstyrelsen.se). The figures were exhibited in the Museum Östergötland for a long time. During the Viking Age the game "Hnefatafl" (=board game similar to Tablut) was very popular. It was considered "bon ton" that one knew how to play it. Most of the figures were made of wood and not of amber (see Damian Walker).
Foto Martin Rundkvist
Literature:
https://www.lansstyrelsen.se/ostergotland/besoksmal/kulturmiljoer/batgravar-i-skamby.html#0
Damian Walker, Reconstructing Hnefatafl, 2014, ISBN 978-1-291-73078-4