What is this letter? Conscription notice?

[Paolo67]

This official letter was in the back of a soldbuch belonging to the same person.
Is it an WH call up notice? Are these common?
Thanks!
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[Paolo67]

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[ATTACH]3828865[/ATTACH]

[ATTACH]3828866[/ATTACH]

[Paolo67]

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[ATTACH]3828867[/ATTACH]

[JUNGCO]

Yes
Jeff

[Paolo67]

Thank you Jeff!