The Revell kits are all over the place
scale wise because they want them to be approximately
the same size as
objects, as the market is considered to be children's toy buyers who are
not concerned with scale relationships, rather they are concerned with
how big it is for what it costs.
If some of those were made to the same scale the price points would be all over the map due to
mould costs, which is why they chose to re-pop some of the Fine Molds kits as 'Premier' models
for the geek adults.
Bupkus to do with any supposed
metrification of scales, there are
decimal scales which
come from engineering (as opposed to 1/8"=1'[1/96], 1/4"=1'[1/48], 3/8"=1'[1/32] etc. which come
from architecture) but only some of those have numbers designations
similar to
metric scales,
however the real world relationship to actual units is completely different. 1:50 in Imperial/US aint'
the same as 1:50 in Metric. Ditto 1:10, 1:20, 1:25, 1:30, 1:40 etc.
BTW 1:33 is a metric
architecture scale and not unusual in paper models.
Personally speaking I think 'box scale' is an old misnomer, as (after working a stint in an injection moulding
company) I believe that the reality was those old kit sizes were based on moulding machine capacity,
e.g. what was the size limit of the mould the machine could hold?, as machines got larger, the moulds
got larger and so did the kits. The ability to standardize the
scale rather than the
size of
the product changed everything.
That they could fit anything they wanted to in a few standardized boxes was a side effect.