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FYI, One thing you have to specify is if it is for a wood or leather covered instrument binnacle. The wood binnacle version (250SE and earlier) is lightly longer by about a 1/4". Looks like it might be for the earlier wood binnacle.I converted my 280SE to the wood and had to replace both sides on the upper dash.
If the last 1/4" is tapered as if pushed into a recess, than it is the wood variety.