Luftwaffe K98 bayonet frog in brown leather with LBA mark unit marked

Early 'choclate' brown Luftwaffe K98 frog in light worn condition. Maker marked on the reverse to a Berlin manufactuer, accepted in the Luftwaffe with the LBA marking. Shows large unit markings '7. Kp. Ln. Regt. 2′ and Ln. K. 1/17'. Leather is still supple. Aluminum rivets, indicating it was produced before 1940. The date is not clearly visible anymore due wear, but I would say this frog dates back to 1938.