For those in need, there is one for sale at the link below.

Details for Item # 20402 Go to JoeSalter.com +
Lyman #103 Bolt Peep For Mannlicher Schdenauer 1903 Rifle
Price: US $345.00
Click on thumbnails below to enlarge images Maker: Lyman Model: Peep Sight

This windage, adjustable sight is only marked "Pat Mar 9 15" on base. Sight is mounted with dovetail into rear of M-S Bolt, this version has a double base with built in windage adjustment and locking lever on left side. Sight shows light stains with 85% blue, the eye cup is missing . A rare variation of these fine micrometer adjustable sights.

http://www.joesalter.com/

Cheers

Tom