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The Ventura 69 Agnar 105mm lens is a medium format camera requiring 120 film.  It’s a fold- out bellows with a kick-stand and is based on the Agfa Billy Record I.   There’s 3 versions of this camera that I’ve come across.  There are two 105mm 4.5 versions.  One has the Vario shutter and the other the Pronto shutter, the infinity markings are different, and the speeds are reversed as well. As you’ll see in the photos above, the Vario shutter doesn’t have the 100 shutter speed or the self-timer.  The 3rd version has the Vario shutter too, but the slower 6.3 lens and the speeds are not reversed as in the 4.5 Vario version.  The kick-stand for the 6.3 is positioned just like the one for the 4.5 with the Pronto shutter.  Not so for the 4.5 with the Vario shutter.  This kick- stand, when standing erect and facing you opens from left to right.  It’s a very weak method of keeping the camera  upright and is probably why it was changed to the other method of opening.  The camera that I used for the photographs below was the Ventura 69 Agnar 105mm 4.5 with the Vario shutter. These cameras are notorious for having petrified focusing rings.  The first lens screws into the second lens and those threads have the lubricant used by Agfa. 
This lubricant, after time, metamorphosized into glue. Hence, many of them look great but you can’t rotate the focusing ring without repairing it.  To remove the lens all you need is slip-joint pair of pliers and a small flat-tipped screwdriver.  Some will say that pliers are barbarous, savage a maybe even uncivilized; nevertheless, if you apply it with proper pressure it’s very effective.  It should be like holding a bird in your hand...  tight enough so that it doesn’t fly away and yet not so tight that you crush it.  Once you have the right pressure, just turn it and it acquiesces immediately. Once the lenses are removed from the body of the camera, they must be separated and it doesn’t matter how much they love each other--you’ve got to be brave and separate’em.  I’ve read several solutions on how to loosen these frozen-in-time lenses.  Many suggest different liquid solutions and others a concoction of these loosening agents. Here’s an easy solution:  just toast it.  That’s right, 5 minutes in your toaster oven using the toast button will turn the frozen lubricant into a butter bar.  Less than five minutes, and you’ll be forced to do more scraping to get the stuff
off.  I’ve gone up to 25 minutes on some lenses without any ill effects.  After 5 minutes, its burning hot and most of the lubricant can be wiped off with cotton swabs or rags.  After cleaning it off, just lubricate the threads anew, refocus the lens and the camera is ready to go after you’ve ensured that the bellows is light-tight and the back has been resealed, of course. The camera has no light meter and no rangefinder so you’ll have to provide for these.  Or just make an educated guess by using the Sunny-16 rule and estimating the distance.  I use a rangefinder that fits in the flash shoe and a handheld light meter to get the job done. Since this is a 6x9 camera, the 120 roll of film will only give you 8 photographs and that’s it. They’re the size of a 4x6 photograph.  You really have to take your time with the focusing and the metering if you don’t want to waste the film.  Below are the 8 I managed to squeeze out of the Ventura 69 (Vario) 105mm 4.5.
Ready to be toasted
VENTURA 69 AGNAR 105mm 4.5 PHOTOGRAPHY
Here they are separated.
Ventura 69 &  Ventura 69 Deluxe Manual