The book "Metelerkamp" by Rodger Godfrey Metelerkamp published 1st November 1969 is a 29 page foolscap, from which the text below is extracted...

My copy is a leather bound edition, that appears to have been manually typed and copied. 

Inserted ahead of the Preface is a copy of the impression of the wax seal (mentioned in the text) a copy of which is reproduced here.

Whether this is in fact the family crest is unknown, but as no better evidence exists, it must be assumed..

Further into this site you can read the first 17 pages as transcribed originally by Tim Metelerkamp, as amended by Bruce Metelerkamp.

Bound copies are known to exist in the ownership of:

For any comments or additions, please feel free to contact me via email at: bruce.metelerkamp AT .com my gmail friends will work it out :)

There is a record of how I went about finding and contacting others on the Internet back in '97 on the Collecting Info page (hilariously old school :)!

My own particular lineage (as extended using the book's format) is here.