Editing Signature Plastics SA family

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{{infobox dkeycapfamily
| image name      = 
| manufacturer    = [[Signature Plastics]]
| height profile  = 
| surface profile = Spherical
| inscriptions    = Double-shot
| material        = 
| keycap mounts   = Various
| thickness       = 
| introduced      = 
| discontinued    = 
| website         = 
}}

[[File:Straight outta Comptec.jpg|250px|thumbnail|[[Acorn BBC Microcomputer|BBC Micro]] keycaps from Comptec, for three different switch families]]

The '''SA family''' is a [[spherical keycap]] profile family offered by [[Signature Plastics]]. "SA" denotes '''spherical''' keycaps, with the same profile across '''all rows'''. Originally a flat profile, SA was followed by the spherical sculptured SS profile, which was later retired. SA itself was later retooled for a sculptured profile, but retained its existing name.<ref name="SP" />

According to Signature Plastics, this family was originally made to fit keyboards made before 1980. Currently, this family does contain [[space bar|space bars]] which measure 4, 6.25, 7 and 8 [[unit]]s, which were most widely used back then.

[[File:Signature Plastics SA profile.svg|centre]]

== Available keycap sizes and shapes ==
* S: semi-matte (smooth) top and sides
* G: gloss top and sides
* M: matte top (rough), semi-matte sides
The size is in units × 100. Space bars are row 3 with convex top.

Rows 2 and 4 are identical. Legends for all rows can be used 180 degrees turned. 1 units row 3 keys are symmetrical by 90 degrees. For example row 4 Z can serve as row 2 Z in DE-layout. Row 3 cursor arrows are usable for all 4 directions.

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== Table of confirmed key sizes ==

{|class="wikitable"
|Angle ||-13 ||  -7 ||   0 ||   7 ||   0 ||
|-
|Size ||row 1||row 2||row 3||row 4||space||
|-
|100  || SGM || SGM || SGM || SGM || ||
|-
|100C ||     || S M || S M ||     || ||center nub (slightly off-center)
|-
|100D ||     ||     || SGM ||     || ||deep dish
|-
|125  ||     || S M || S M || S M || ||
|-
|150  || S M || S M || SGM || S M || ||
|-
|175  || S M || S M || S   || S M ||  ||
|-
|175S ||     ||     || S M ||     ||  ||stepped, off-center mount (like 1.25 units key)
|-
|200  || S   || S M || SGM || S M ||  ||Stabiliser 0.625 units left and right
|-
|200P || S   || S M || SGM || S M ||  ||fits on 2 switches
|-
|225  ||     || S  || S   || S   ||  ||Stabiliser 0.625 units left and right
|-
|250  ||     ||    || S M || S   ||  ||Stabiliser 0.625 units left and right
|-
|275  ||     || S  || S   || S   ||  ||Stabiliser 0.625 units left and right
|-
|300  ||     ||    || SGM ||     ||  ||Stabiliser 1 unit left and right
|-
|400  ||     ||    ||     ||     || S M ||Stabiliser 1.5 units left and right
|-
|450  ||     ||    ||     ||     || S   ||Stabiliser 1.82 units left and right
|-
|625  ||     ||    ||     ||     || S   ||fits Cherry, Filco and Leopold
|-
|700  ||     ||    ||     ||     || S   ||Stabiliser 3 units left and right, 2.25 units right
|-
|800  ||     ||    ||     ||     || SGM ||Stabiliser 3.5 units left and right
|-
|900  ||     ||    ||     ||     || S M ||Stabiliser 3.5 units left and right
|-
|2X2  ||     ||    ||  S  ||     ||     ||Stabiliser 0.625 units left and right in one row
|-
|JRET ||     ||    ||  S  ||     ||     ||ISO-Return (1.5x2x1.25)
|-
|}

==References==
<references>
<ref name="SP">Pimp My Keyboard — [https://pimpmykeyboard.zendesk.com/hc/en-us/articles/204415935-The-Origin-of-SP-Keycap-Families The Origin of SP Keycap Families]</ref>
</references>

==See also==
* [[Space bar dimensions]]

[[Category:Signature Plastics keycap families]]
[[Category:Spherical keycap families]]
[[Category:Contemporary keycap families]]