Speaking of the 137 vs 184 last comparison, the 184 is one of those lasts that doesn't work well for me. I find the vamp/toe of the last to be comfortable, but the heel isn't narrow enough for me. Comparatively speaking. the 137's heel and instep grips my ankle well without the toe being restrictive (but doesn't fit as well as the 184). In an ideal world, I would have the vamp/toe of the 184 but the back of 137's last.
That's exactly my problem too,
184 last with front part comfortably, snug at the the vamp, toes are comfortable (slightly compressed when bend), but the heel is less secure, regardless of the heel slippage generally the heel feel less 'locked in'.
137 (unline) with heel secured but the front part is less comfortable as the 184
Replies from EG sales: the Belgravia is slimmer at the heel compared to the Duke. The 137 last is wider, and broader than the 184 used for the Belgravia. I am not sure about the slimmer heel with 184 last.
I am ordering a pair of Hampstead in uk7 lined 137 last for comparison again. Lets me show you some more photos when it arrives!
Finally, do you think UK7 will be my choice for other lasts such as 606/202 Sharklin and dover? Thanks!