Leerdam marks

most common Acid etch marks

= Andries D. Copier, 1901-1991

(sandblasted mark 2 in use 1945-1948)

= Andries D. Copier, 1901-1991

  = K.P.C.de Bazel (1869-1923)

= H.P. Berlage (1856-1934)

= Chr. Lanooy (1881-1948)

= Chr. Lebeau (1878-1945)

= L. Bloch (1909-1999)

= Cornelis de Lorm (1875-1942)

= W.J. Rozendaal (1899-1971) for Kristalunie, Maastricht

 

Yearletters Leerdam Unica '27-48

Yearletter

Number of pieces made

Year

A

Unknown

1927/8

B

Unknown

1929

C

Unknown

1930

D

Unknown

1931

E

Unknown

1932

F

457

1933

G

446

1933/4

H

712

1934

K

530

1935

L

475

1936

M

446

1937

N

277

1937

O

662

1937/8

P

111

1939

R

189

1940

S

789

1941

T

312

1942

V

1273

1943

W

1841

1944

X

1750

1946

Z

647

1947/8

 

 

 

Unica using these year letters are most likely made by A.D. Copier, Chris Lebeau or C.J. Lanooy.

 

A - numbers:

A1, A2, A3 etc. up to A910 were used for cut, etched and engraved pieces made in the Leerdam glass school between 1944 and 1950 after designs of Floris Meydam.

A911 up to A1307 were used between 1950 and 1962 for "Abstract compositions", small pieces designed by Floris Meydam or Willem Heesen.

A1317 up to A1336 were made between 1971 and 1975. No more pieces with a single A-numbering were made after 1975.

 

Yearletters Leerdam Unica '51-86

Yearletter

Number made

Year

AC

75 +/-

1951

AD

520 +/-

1952

AE

860 +/-

1953

AF

620 +/-

1954

AH

980 +/-

1955

AM

1500 +/-

1956

MA

3003

1957

MB

1679

1958

MC

1397

1959

MD

742

1960

ME

645

1961

MF

902

1962

MH

247

1963

MK

396

1964

ML

496

1965

MO

573

1966

MP

166

1967

MR

283

1968

MS

211

1969

MT

469

1970

MV

135

1971

MW

164

1972

MAA

28

1973

MAB

149

1974

MAC

269

1975

MAD

241

1976

MAE

229

1977

FM78

143

1978

FM79

189

1979

FM80

348

1980

FM81

264

1981

FM82

47

1982

FM83

39

1983

FM84

125

1984

FM85

181

1985

FM86

 

1986

 

 

 

Unica signed with the year letters up to 1978 are most likely made by A.D. Copier or F.Meydam. From 1978, the initials of the designer and year of manufacture are indicated.

 

UB Marks

209 pieces with a UB mark were made between 1957 and 1961. UB stands for decorated unica.

From

To

Year

UB1

UB11

1957

UB12

UB106

1958

UB107

UB149

1959

UB150

UB193

1960

UB194

UB209

1961

 

 

 

 

LL Marks

Pieces with a LL (Ligne Libre) number have been made between 1959 and 1976. The designer's name should be included - most was designed by Meydam.

 

 

Year

LL 1

60-59

1959

LL 1

834-60

1960

LL 1

64-960

1960

LL 1

41-1060

1960

LL 1

7-1260

1960

LL 1

17-1660

1960

LL 1

12-1760

1960

LL 1

13-1860

1960

LL 1

4-1960

1960

LL 1

77-2060

1960

LL 1

8-2160

1960

LL 1

12-2260

1960

LL 1

24-2360

1960

LL 1

115-61

1961

LLM 1

114-62

1962

LLM 1

377-63

1963

LLM 1

101-64

1964

LLM 1

53-65

1965

LLM 1

165-66

1966

LLM 1

265-67

1967

LLM 1

191-68

1968

LLM 1

59-69

1969

LLM 1

161-70

1970

LLM 1

135-71

1971

LLM 1

196-72

1972

LLM 1

67-73

1973

LLM 1

42-74

1974

LLM 1

45-75

1975

LLM1

357-76

1976

LEM Marks:

Limited Edition numbers in use since 1973. The numbering refers to quantities produced - not to year of creation. Designer: Floris Meydam.

Number

 

 

LEM 16-50

Number 16

Out of 50

 

Serica Marks:

Meydam Serica after 1978, production quantity, sequence number, initials

Royal Leerdam

 

 

50-48 FM

Number 48

Out of 50

 

Glassblowers- and engraver's initials:

Found after yearletter and -number, mostly after 1959

Initial

Name

From year

H

Den Hartog

1931

K

Keuken

1927

LL

Van der Linden

1936

L

Van Lopik

1948

VO

Van Opijnen

1940

W

Verwoerd

1937

K

Feodor Kaebisch

1941

V (PV)

Vermeer

1939

.vl

Van Ingen

1937

O

Den Ottelander

1941

 

Designers which have been known to work for Leerdam

Chris Agterberg, 1883-1948

C.C. van Asch van Wijck (1900-1932)

K.P.C. de Bazel (1869-1923)

H.P.Berlage (1856-1934)

Lucienne Bloch (1909-1999)

Andries D. Copier (1901-1991)

Ida Falkenberg-Lieferinck (1901)

Jaap Gidding (1887-1955)

Dom Gregorius de Wit (1892-1978)

Wim Harzing (1898-1978)

Willem Heesen ()

J. Jongert (1883-1942)

Chris Lebeau (1878-1945)

Frits Lensfelt (1886-1945)

C.A. Lion Cachet (1864-1945)

Chris Lanooy (1881-1948)

Cornelis de Lorm (1875-1942)

Floris Meydam (1919)

Joep Nicolas (1897-1972)

R.Srebelle (1880-1959)

Wim Stuurman (1908)

Stef Uiterwaal (1889-1960)

S. Valkema ()

Jules Vermeire (1885-1977)

Frank Lloyd Wright (1868-1959)

 Designers which have been known to work for Maastricht

Ed Cuypers (1859-1927)

Jan Eisenloeffel (1876-1957)

H. Kannegieter (1898-1991)

Jan de Meyer (1878-1950)

W.J. Rozendaal (1899-1971)

Piet Zwart (1885-1977)

(back)