The All Risk Certificaat insures the purchased wedding ring against theft and loss for the duration of the bearer's life time.
The Garantie Certificaat guarantees the specified quality of the diamonds in the eternity ring and promises to replace and reset any stone fallen out off its setting for free during the bearer's life time.
I was happy to see that both these Certificates, initiated by my father in the late 1960s and 70s, are still being offered by Martinshof today (2010) with the purchase of any Martinshof ring.