But how many years in soviet service? Priority for us is not the export but Soviet fielded systems. Dyesna and early Volkhov is important here as soviet-only equipment for early-mid 60's conflicts.
Is there any data somewhere on the composition of "System 75" type batteries in the USSR? A russian source mentions 4600 batteries (still?) active in the early 1980's.

Not much knowledge on that, except:

Seven PVO divisions were formed in 1957—Tallin, Baltic, Crimean, Polyarnyy, Komsomol’sk-na-Amure, Sovetskaya gavan’, and Kamchatka.
The Northern PVO Corps was being formed.
In 1958-1959 another four divisions were formed—Chukotka, Dnepropetrovsk, Khar’kov, and Stalingrad.
The Northern PVO Army derived from the Northern and White Sea corps was formed in 1958.
Instead of the extant 20 strategic and operational PVO units, 11 were established in 1960—two districts, seven separate armies, and two separate corps.

A surface-to-air missile curtain comprising 55 S-75 battalions stretching 1340 kilometers from Stalingrad to Orsk and Sary-Shagan was created September 6-9, 1960 to prevent violations of USSR air space.

From 1960 to 1962 a second antiaircraft boundary from Krasnovodsk to Ayaguz stretching 2875 kilometers was created. Also envisaged was creation of composite groupings along these boundaries:
Riga—Kaliningrad—Kaunas (20 S-75 and 25 S-125 battalions);
Vil’nius—Lida—Kobrin (9 S-75 and 12 S-125 battalions);
Poti—Kerch’—Yevpatoriya—Odessa (48 SAM battalions).

In all, by 1961 56 S-25 and 154 S-75 SAM regiments, 22 S-75 SAM brigades, and 6 S-125 SAM regiments, 12 composite S-75 and S-125 brigades had been deployed.

Hpasp, do you have any info on Soviet Naval SAM launchers?

I am trying to find the min, max, train and elevation, the rate of train and elevation, and the reload/launch cycle time of the launchers. I have this info on USN SAM launchers but not the Soviet ones.

The attached image, which I pieced together from four different pages of The Naval Institute Guide to World Naval Weapons Systems, is about US Navy cold war missile launchers and represents the type of information that I am looking for with regard to Soviet Naval missile launchers.

These three launchers are the ones I would like to find info on the most but info about any Non-VLS launchers would be helpful.

ZIF-101 M-1 «Volna» SAM system launchers / У ЗИФ-101 ЗРК М-1 «Волна»

B-187 SAM system M-11 «Shtorm» launchers / ПУ Б-187 УЗРК М-11 «Шторм»

ZIF-122 SAM 4K33 «Osa-M» launchers / ПУ ЗИФ-122 ЗРК 4К33 «Оса-М»