Vision block ID?

[Jakko Westerbeke]

Does anyone recognise the following vision blocks, as to type, parts numbers, manufacturer, etc.?



These are the type used in the Caterpillar D6A (and presumably D7A) armoured bulldozers, the illustration is from the operator’s manual but it only shows these two pictures with a little bit of text that doesn’t identify the blocks as such. It would help a lot with the restoration of a D6A to know what they are, so that hopefully some may be sourced, or perhaps replicas created.

[David Dunlop]

Jakko.

From what I have read on the Armoured Caterpillar thread, they seem to have maintained a pretty good archive. Would it be worth contacting them to see if anything in their files would indicate if these were bought ‘off the shelf’ from use with other vehicles, or custom ordered just for the D6A and D7A?


David

[Jakko Westerbeke]

They do, but as I understood it from the person I’m asking the question for, it would require Caterpillar staff to go digging through that archive, so (I get the impression) he’s hoping someone is able to identify the part without needing to go that route.