400 SPM plate research

400 SPM
Format
Reverse Dateless
Authority Issuer
Sussex (East)
Era
Unknown era
Status
In Private Ownership

Price History

£0£15k£30k£45k£60kJan 2026

PWPlateworth estimate

Current estimate

£2,760

Estimate

DSDVLA Search

January 2026

£2,760

Sale
Approx value
£2,760

Plateworth estimate

Price Change
+0.0%

over full record

Last Price Change

No sale movement

Dealer Listings
0 shown

price-change events

Listing Variance

single listing

Cheapest Listing

No listing

Plate History

400 SPM is a Reverse Dateless registration. Plateworth's current estimate is £2,760 with a working range of £2,346 to £3,174, based on 1 comparable sale. The latest evidence is a sale from DVLA Search at £2,760. No active dealer listing is shown, so the page separates the Plateworth estimate from public sale evidence. This page currently shows 1 timeline event from the loaded registration record.

  1. DVLA Search sale recorded

    Date precision: day

    January 2026

    Public sale record used by the valuation context.

    £2,760

About 400 SPM

Reverse dateless plates place the numbers before the original local index letters, so the registration carries local authority provenance without a year marker. The PM index mark traces back to Sussex (East). This reverse sequence was issued from the 1950s onwards as earlier dateless runs became exhausted. At 6 characters, 400 SPM is a standard-length registration for this era.

Reverse datelessSussex (East)Age-neutralStandard length

Plate Speak

AOOSPM

Most likely reading: "AOOSPM"

Other possible readings

400 SPMAOOSPM400SPMInitials

Price Guide for this Format

6 loaded same-format comparable prices shown until active listings are available.

£2,210

Lowest

£2,680

Average

£4,000

Highest

Distribution

<£2.5k67%
£2.5k-£10k33%
£10k+0%

Prices are based on loaded sale evidence and the Plateworth estimate. Latest evidence: January 2026.