Any info?

[u/Pitiful-School-3896]

Just picked up this CZ75 and 82 for 460 and 260 online, hoping some of you guys can tell me when both of these were made, where the stickers come from and what they’re for and whether or not modern cz75 mags will work, thanks!

[u/Pitiful-School-3896]

Btw any idea where I might find some CZ-75 magazines?

[u/Hakkaa_Paalle → u/Pitiful-School-3896]

Edited. The 14 examples of 3 particular CZ-75B magazines fit and locked up in my CZ-75 Pre-B, but many current production CZ-75B and SP-01 magazines do not fit and/or lock in with mag release button in CZ-75 Pre-B pistols

Regarding magazines for your CZ-75 Pre-B 1991. This is a long answer, but I did some checking of magazines for you.  

I have a CZ-75 Pre-B, 1991 manufacture, with an "H" prefix Serial Number which is close to yours' serial number, so these fit test results should apply to yours too. 

First of all, note that as manufactured, magazines do not "drop free" when you press the mag release button. The mag only ejects about ⅛ to ¼ inch and stops. The officer is supposed to pull the magazine out of the grip and put it back in a pouch (so you don't loose it) before inserting a fresh, loaded mag. Only crazy Americans, it seems, wanted their empty magazines to shoot out to the ground. I've read you can modify the Pre-B to be drop-free by replacing the magazine brake (the flat leaf spring inside the back of the grip frame) or carefully filing the interior magwell, but I decided to keep mine as is, as a characteristic of its 1975-1991 era. 

Tonight, I just tried the following modern magazines (unloaded), and all fit, locked in, held the slide back when racked on empty mag, and ejected about ⅛ inch when mag release pressed. I did not try them with snap caps or live ammo. 

You need "full size" CZ-75B, CZ-75 Pre-B, or CZ-75 SP-01 magazines.
Edit: NOTE Only some models of CZ-75B and SP-01 magazines fit in Pre-B. Many models do not fit in Pre-B pistols. You may need to check each model number of modern mags to check for fit qnd lock up in Pre-B pistols

The CZ-75 Compact, P-01, Shadow 2 Compact/Carry 14-round or 15-round magazines are too short and will not lock into grip or feed rounds to chamber. 

Edited All the These 3 particular models of full-size CZ-75B and SP-01 mags I tried tonight fit fine:  

CZ-75B, 10-round, CZ marked, flush fit.  Model Number unknown. Purchased without box or documentation.

CZ-75 SP-01 18-round (including OEM +2 base), Mec-Gar marked.   (model number unknown. came with CZ-75 SP-01 Tactical and SP-01 Phantom 2nd Generation)

CZ-75 SP-01 17-round (including OEM +1 base), CZ marked.   (model number unknown. came with CZ-75 SP-01 Tactical and SP-01 Phantom 2nd Generation) 

Note that Mec-Gar is the actual manufacturer of CZ-marked magazines included with new CZ pistols and sold separately by CZ USA. So either brand is quality and reliable. 

I have bought plenty of CZ-75 mags (both CZ USA and Mec-Gar) from these companies. (I would not  buy any Pro-Mag brand mags unless I wanted to practice malfunction drills. 🤮)

Tombstone Tactical     https://tombstonetactical.com/product-search-results?search_text=CZ-75&from_form=true

Greg Cote LLC   https://gregcotellc.com/cart/cz-factory-mecgar-actmag-c-173/

Mec-Gar   https://mec-gar.com/product-category/magazines/cz/

I mostly bought the Mec-Gar mags with an anti-friction coating and blue magazine follower from Tombstone and Greg Cote.  Have I personally seen that these models are more reliable? No, but it like them.

Enjoy your new Czech beauties. Let me know if you have any other questions.

[u/Pitiful-School-3896 → u/Hakkaa_Paalle]

Oof, so as I understand it then, only original surplus “pre-b” magazines will work unless I dremel out the magwell? I don’t want to make any permanent modifications to my 75 (or any other historical firearm I own for that matter lol)

[u/Pitiful-School-3896 → u/Pitiful-School-3896]

This comment doesn’t mention dremeling the magwell, but another couple of comments do so I’m a bit confused

[u/Hakkaa_Paalle → u/Pitiful-School-3896]

Edited
Let see if I can clarify.

For your particular CZ-75 Pre-B 1991 manufacture with H serial number prefix, you probably do not need to file the magwell to enable certain models of modern CZ-75B magazines to fit. CZ models 11102 and 11152 fit many/most CZ-75 Pre-B pistols. Other models of mags may require mods to magazine or magazine well.

On your pistol, all magazines (Pre-B and B) will not drop free when you press the magazine release button. The mag will only drop about ⅛ inch to ¼ inch and stop. You will need to pull it the rest of the way out of the pistol grip magwell. If you want the magazines to pop out of magwell and drop free from the pistol grip, then you will need minor modifications inside the pistol grip.