it is: Annotated Order of Battle of the Wehrmacht in the West circa 1 June 1944
Same document, different version and title Jan.
It appears that Ost-Gren.-Regt. z.b.V. 752 was created specifically to fill the coastal defenses on the west coast of the Cotentin between the Brest and St. Malo fortified zones. Its composition changed a couple of times and the designations of its units appear to have been given in different ways too, so it is rather confusing.
Ost-Gren.-Regt. z.b.V. 752, Gefechtsstand – Gavray, Kdr.: Oberst Kessler
Ost-Art.-Btl. 752 This is the most confusing unit. It was incorporated into Ost-Gren.-Regt. z.b.V. 752 in April. A Gliderung from later in June shows this unit as a Pi.-Btl. with 3.Kp. replaced by a 3.Bttr. On 9 June it was referred to as an “Art.-Abtl.”
Sich.-Btl. 521, Gefechtsstand – vicinity Granville, Kdr: Major Franz Falk, 1.-4. Kp.
Ost-Btl. 635, Gefechtsstand – St. Nicolas (east of Granville), 1.Kp. – Douville (northeast of Granville), 2.Kp. – St. Nicolas, 3.Kp. – St. Pair (south of Granville), 4.Kp. – Queron (7 kilometers south of Granville)
Ost-Btl. 797 (Georgiches) (I./Gren.Regt. 739) (minus 2. Kp., the battalion was attached from Inf.-Div. 709), Gefechtsstand – Gouville (12 kilometers northwest of Coutances), 3.Kp. – Montmartin (8 kilometers southwest of Coutances)
1./Pi.-Btl. 319 (was attached from 319. Inf.-Div.)