Rare lens Industar-61 with distance scale in FEET

Hello everyone!
The export version of the Industar-61 lens with a distance scale in feet is very rare.
I know of only a few examples:
I-61 #6591212 (1965)
I-61 #8519490 (1973)
I-61 #8697161 (1974)
I-61 #8715502 (1975)
I-61 #8864961 (1976)
Does anyone have this lens or camera with documentation?
I'd like to know which countries they were exported to?

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Hello and welcome to the forum Yuriy. Unfortunately I can't help, but I hope someone who can help sees this thread soon.

I know this place isn't the most busy forum that there is, but I thought someone would've replied by now.

Sorry I wasn't replying because I have never encountered such lens.. I have tens of them in my collection but none as such.

Found this on AI, also one for sale on Ebay:The Industar-61 lens with a distance scale in feet is a highly sought-after, rare export variant. While the standard production models manufactured by the FED factory in Kharkiv, Ukraine, exclusively feature a distance scale in metres, specific batches were specifically engraved in feet for Western export markets.

Fed 52mm f2.8 Industar 61 leica screw coupled lens, silver mount. | eBay UK

Thanks Steve: I have just bought it! But I have found another one, always on ebay UK: FED Industar N-61 53mm f2.8 M39 Mount Manual Focus Lens | eBay UK I have made a short research on ebay. Nothing outside ebay UK, for the moment, which is understandable...
And thanks too to Yuriy: I didn't know that lens.
Amitiés. Jacques.

In fact there is a certain number of these lenses on ebay UK, alone or mounted on bodies. Probably batches reserved to the United Kingdom, as Steve said....

Jacques.