oldest Primaris Wolfspear

The Ultima Founding of Space Marine Chapters occurred in the wake of the events of Abaddon the Despoiler's 13th Black Crusade and the fall of Cadia in ca. 999.M41.

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Indomitus Crusade - In the wake of the Battle of Lion's Gate, Roboute Guilliman gathers the largest armada seen since the time of the Great Crusade and leads his new Primaris Space Marine Chapters and an alliance of other Imperial forces on a massive counterassault across the galaxy against the forces of Chaos and xenos threats. The Indomitus Crusade's first phase came to an end at the Battle of Raukos twelve standard years after its start. In ca. 012.M42, Lord Commander Guilliman turned his eye to his Realm of Ultramar and its defence from his brother Mortarion and the servants of Nurgle during the Plague Wars.

https://warhammer40k.fandom.com/wiki/Era_Indomitus

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currently oldest date

ca. 127.M42 Cain Archive Seventh Expansion - Ayjaepi Clothier publishes In Blackest Night: The Millennial Wars Appraised. It is later utilised by Inquisitor Amberly Vail and incorporated as an extract within the Cain Archive.

https://warhammer40k.fandom.com/wiki/M42

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Mistral AI:

The oldest Primaris Wolfspear could be up to several centuries old as of the current Warhammer 40,000 timeline (around 999.M41). Here’s why:

• The Wolfspear were founded during the Ultima Founding (ca. 999.M41) from the ranks of the Unnumbered Sons—Primaris Space Marines who fought in the Indomitus Crusade. Some of these Greyshields (Primaris veterans) were already millennia old due to stasis and the unique way Primaris Marines were created and stored by Belisarius Cawl over 10,000 years (reddit.com+2.)
• However, most Primaris Marines, including the Wolfspear, are much younger—typically only a few centuries old at most, as they were created or awakened during or just before the Indomitus Crusade (warhammer40k.fandom.com+2.)

In summary: The absolute oldest Wolfspear could be over a thousand years old if they were among the original Greyshields, but most are likely between 100–300 years old as of the current lore.

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