Welcome Pilgrim,
Plenty of knowledgeable people on here who I'm sure can help you with info on your 75. I would suggest using some of the other sections like General Airgun, Non Airgun and maybe Collectables because this Introductory section isn't as well visited as the others. Go on, start a new thread on the 75 in General Airgun and you'll get the replies coming in
HW77K .22, HW100KT .22, HW95K .22. AA TX200 MK3 .22. AA S410 MK3 .177. HW80 .25 HW30S .22. Pistols: Walther CP88 .177, Hatsan Mod25 Supercharger .22, HW45 Silver Star .177, Webley Alecto .177, SMK Victory CP2 .22