I have a sporterized 1903 with a Lyman 57S 03A3 sight that I inherited. The front sight is Lyman but I don't know the model number. It was shooting high and to the left (3" left, 4" high at 50 yards). When I tried to zero the rifle I was able to zero for windage but was stuck about 2" high at 50 yards because the rear sight would not adjust any lower. I've included pictures of both the rear and front sights. The top of the front sight is about 1-1/8" from the center of the barrel. Is anybody familiar with this rifle and these sights? It looks like the top piece on the front sight could be changed but I wouldn't know what part number it would be or where to get it. I contacted Lyman but they said they no longer make these sights and they were antique and obsolete.
Front sight left view
View: https://drive.google.com/open?id=1ilOdlZwxuj1RcPgDjbobERu_s6XM5z9E
Front sight right view
View: https://drive.google.com/open?id=1-uSsQxrRizm5uWkYaRRz1T9usUW6BNEq
Rear Sight rear view
View: https://drive.google.com/open?id=1CMn9PxJ1QA2UAFP5GYubKPln7lIB-HK8
Rear Sight front view
View: https://drive.google.com/open?id=1kqX6kPR5XHSk1Qvx0Ii3kfKNVUTmV52d
Rear sight top view
View: https://drive.google.com/open?id=1PElk-dREVur3Sal-QCFJ1PuB5-KkGnVH
Rear sight side view
Lyman Rear Sight side.jpg
Front sight left view
View: https://drive.google.com/open?id=1ilOdlZwxuj1RcPgDjbobERu_s6XM5z9E
Front sight right view
View: https://drive.google.com/open?id=1-uSsQxrRizm5uWkYaRRz1T9usUW6BNEq
Rear Sight rear view
View: https://drive.google.com/open?id=1CMn9PxJ1QA2UAFP5GYubKPln7lIB-HK8
Rear Sight front view
View: https://drive.google.com/open?id=1kqX6kPR5XHSk1Qvx0Ii3kfKNVUTmV52d
Rear sight top view
View: https://drive.google.com/open?id=1PElk-dREVur3Sal-QCFJ1PuB5-KkGnVH
Rear sight side view
Lyman Rear Sight side.jpg