Become a Full Member and get the official Linkage Tour and the official Starting Aid. This information alone will pay for your membership
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.