The Crosman Bullseye Target model 105 is a pump pistol made between 1947-52
No-one seem to have a diagram on the repeater but I did find this on the web. see the link below
Crosman still has parts for the pistol. You can order directly from them. Crosman has all their Owners manual and Parts manuals online. See the link below. When it opens scroll down and click on "download Manual/Parts diagram". Then select "Crosman Pistols". From there you should be able to locate you pistol's diagram. After you figure out what you want go back and call Crosman Customer service and order the parts. I've rebuilt 4 of the 357's this way.
Go to the crosman home page "Crosman.com" and scroll ALL THE WAY DOWN to the bottom of the page and click on "Find a service Center". They will help you. Crosman owns Benjamin.
See the attached link below for the parts diagram. This pistol was made between 1953-54. Crosman no longer has parts for it. However they offer a free locater of shops the repair Crosman antiques.
see the link below for the owners manual. The Marksman Repeater is a 4.5 .177 caliber pistol not a 5.5 .22 caliber pistol.
first variant single shot mfg 1966-1980. second variant (without adjustable power)mfg 1981-1986
The Crosman 357W is a pellet pistol not an Airsoft pistol.
See the link below for the Crosman 1300. It is similar to the 1322 model.
Crosman still services this pistol it is best to contact them and tell them what you need, their address is: Crosman Corporation7629 Routes 5 & 20East Bloomfield, NY 144431-800-7AIRGUN (724-7486)
Crosman no longer has parts for this pistol. However they offer a free service to locate independent shops that repair older Crosman air guns and rifles. See the link below.
I believe it to be a vintage Iver Johnson pistol